Add test for calling ps from thread
Normalize indent to 2 spaces in ext/darwin/sys/proctable.c
Remove commented out code and variable args

It was an old attempt to query command line args which was not working
Merge branch 'fix-darwin-ruby1.9-stackoverflow' into extend-darwin
Return ruby String from argv_of_pid instead of copying data
Use current process info in darwin test as otherwise cmdline can be nil
Get fields from ProcTableStruct
Add description to each field
Read saved pathname of the executed command to exe
Read environment variables to environ
Use sleep process for testing on darwin, add assertions and tests

Add equality assertions for pid, ppid, pgid, ruid, rgid, comm, cmdline
Add tests for exe and environ
Populate euid, egid, groups, svuid and svgid for darwin
Merge pull request #37 from toy/extend-darwin

Cleanup extension, rework getting cmdline and add more fields to darwin implementation