Reorganize tools

1) The readme is out-of-date, and unreadable on github
2) Some tools have their own directories, some don't
3) Many tools have neither readme nor descriptions.
4) Some files are misplaced

This reorganizes so that each tool has its own directory, even if it only has a single file
(Hint: If you use a tool, please add/update READMEs)

The master README is complete, and readable on github

The tools are in alphabetical order within category.  There are some cases where this probably isn't the right thing to do, e.g. where there are separate tools that do "to" and "from" conversions.

Each tool has at least a 1-line description in the master readme

This commit does not change any tool.

.gitignore

@@ -0,0 +1,4 @@
+\#*
+*~
+*.bak
+*.o

README.md

@@ -1,66 +1,79 @@
-simh support/migration tools.
+#simh support/migration tools.
+
+The tools are organized into categories, each of which has a subdirectory.
+
+For consistency, each tool has its own subdirectory, even if it only contains a single file.
+(READMEs for tools without them are welcome)
+
+
+## Configuration support
+
+Tools to assist with configuring a simulator.
+
+Directory | Contents
+---- | ----
+config11 | Calculate the floating address space layout of a PDP-11 or VAX.
+
+## Converters
+
+Tools that convert/support simulator data file formats
+
+Directory | Contents
+---- | ----
+asc | Convert ASCII file line endings
+decsys | Convert decimal listing file to a DECtape file
+dtos8cvt | Convert a PDP-8 DECtape image from OS/8 format to simulator format.
+gt7cvt | Convert a gt7 magtape dump to a SIMH magtape
+hpconvert | Convert an HP disc image between SIMH and HPDrive formats
+indent | Convert simulator sources to 4-column tabs
+littcvt | Remove density maker from litt format tapes
+m8376 | Assembles 8 PROM files into a 32bit binary file
+mt2tpc | Convert a simh simulated magtape to TPC format
+mtcvtfix | Fix a SIMH magtape containing a misread EOF
+mtcvtodd | Convert an E11 magtape (with odd record sizes) to SIMH
+mtcvtv23 | Convert a tape image in .TPC format to SIMH (.tap)
+noff | Remove <ff> (formfeed, \f) from a source listing
+sfmtcvt | Convert a Motorola S format PROM dump to a binary file
+strrem | Remove a string from each line of a file
+strsub | Substitute a string in each line of a file
+tar2mt | Convert a tar file to a simulated 8192B blocked magtape
+tp512cvt | Convert a tp data file to a simulated 512B blocked magtape
+tpc2mt | Convert a TPC simulated magtape to simh format
+
+## Cross-assemblers
+
+Cross-assemblers for various machine architectures
+
+Directory | Contents
+---- | ----
+hpasm | Assembler for the HP2100
+macro1 | Assembler for the PDP-1
+macro7 | Assembler for the PDP-7
+macro8x | Assembler for the PDP-8
+macro11 | Assembler for the PDP-11
+
+## Extracters
+
+Data extraction tools
+
+Except as noted, all read SIMH tape container format.
+
+Directory | Contents
+---- | ----
+backup | Extract files from a TOPS-10 backup tape 
+ckabstape | Disassemble 18-bit binary paper tape
+mmdir | List directory of Interdata MDM tape
+mtdump | Dump the record structure of a SIMH, E11, TPC, or P7B
+ods2 | Directory, Copy & Search commands for VMS ODS2 disk images
+rawcopy | Create SIMH disk image from physical media on RAW device.
+sdsdump | Disassemble SDS SDS paper tape
+tpdump | Dump files on IBM 1401 tape
+
+## File systems
+
+Provide access to a foreign files system from a host machine.
+
+Directory | Contents
+---- | ----
+putr | Read (and write some) DEC filesystems from PCs
 
-ods2_readme.txt
-config11				- a program for calculating the floating address space layout of a PDP-11 or VAX.
-config11\config11.c
-config11\config11.txt
-converters				- tools to convert/support simulator data files formats
-converters\asc.c
-converters\asc.txt
-converters\dtos8cvt.c
-converters\dtos8cvt.txt
-converters\gt7cvt.c
-converters\littcvt.c
-converters\mtcvtfix.c
-converters\mtcvtodd.c
-converters\mtcvtv23.c
-converters\mtcvtv23.txt
-converters\mt2tpc.c
-converters\sfmtcvt.c
-converters\tar2mt.c
-converters\tar2mt.txt
-converters\tp512cvt.c
-converters\tpc2mt.c
-crossassemblers				- cross assemblers for various machine architectures
-crossassemblers\macro1.c
-crossassemblers\macro11
-crossassemblers\macro7.c
-crossassemblers\macro8x.c
-crossassemblers\macro11\changes
-crossassemblers\macro11\depends
-crossassemblers\macro11\dumpobj.c
-crossassemblers\macro11\dumpobj.dsp
-crossassemblers\macro11\license
-crossassemblers\macro11\macro11.c
-crossassemblers\macro11\macro11.dsp
-crossassemblers\macro11\macro11.dsw
-crossassemblers\macro11\macro11.h
-crossassemblers\macro11\makefile
-crossassemblers\macro11\mlb.c
-crossassemblers\macro11\mlb.h
-crossassemblers\macro11\object.c
-crossassemblers\macro11\object.h
-crossassemblers\macro11\rad50.c
-crossassemblers\macro11\rad50.h
-crossassemblers\macro11\stream2.c
-crossassemblers\macro11\stream2.h
-crossassemblers\macro11\todo
-crossassemblers\macro11\util.c
-crossassemblers\macro11\util.h
-extracters					- data extraction tools
-extracters\backup
-extracters\ckabstape.c
-extracters\mmdir.c
-extracters\mtdump.c
-extracters\mtdump.txt
-extracters\rawcopy
-extracters\sdsdump.c
-extracters\backup\backup.c
-extracters\backup\backup.h
-extracters\backup\backup.txt
-extracters\rawcopy\RawCopy.c
-extracters\rawcopy\RawCopy.txt
-putr
-putr\putr.com
-putr\putr.txt
-putr\readme.txt