sys-proctable 0.4.0 released!

Now with MS Windows support!

CHANGES

- Added MS Windows support (non-cygwin)
- Added environment information for Linux version
- Added real exceptions (type depends on platform)
- Added a test suite (for those with testunit installed)
- Removed the sys-uname requirement
- Heavily modified the extconf.rb script
- Changed "Changelog" to "CHANGES" and "Manifest" to "MANIFEST"
- Added a VERSION constant and class method
- Minor internal directory layout change (put 'os' under 'lib')
- Changed package name to lower case
- Doc changes, including license information