$GS_HOME/alt_bin/stones.st :: stones: Provide information on the running and installed stones

[dalehenrich]

Defer this issue until GemStone 3.5.1 is available for use as solo extent, since 3.5.1 has an option to the gslist command (used to produce running stones list) to produce output in JSON format, so need for parsing gslist output would be eliminated.

• create basic script class
• translate pharo help text (use devKitCommandLine <command-name> --help to see help text) into gsdevkit_launcher format
• add symbolic link from alt_bin to tonel script class file
• implement command functionality
• implement Smalltalk API (some commands will be used internally by other scripts and a Smalltalk API is essential to making this possible)
• add test
• identify the bash scripts that use the command (grep -r devKitCommandLine)
• edit bash scripts to call the new script