grn 6.x-2.2

Changes since 6.x-2.1:

• Extra verbosity not needed.
• Add commented dont use, just in case.
• Add spaces so l163-165 conform w/ coding standards
• Add comment to l118 about why needed
• Add usage to readme.
• Make sure all files have new line at end.
• Rename readme to coding standards
• Is line 137 necessary?
• Add file to test output regexes on.
• Add comment to explain deprecated alias
• Merge rexex (that filters output to remove leading - and Patch) into one, with an addition
• Add grn as a deprecated alias, I keep typing it
• Add doxy
• Use drush_set_error wtih git log
• Shorten git log format option
• Use drush_set_error correctly
• Syntax fix
• Exit if there is a bad tag
• Use drush_set_error, not drush_log

The new feature is that the script removes common prefixes from the beginning of the line: 'Patch ', '- ', or 'Issue ', to clean up output.