Removed unneeded _git_config override

Relic from extraction from git-supp repository.
bash_completion script formatting and cleanup
Simplified shortmap loading
Shortmaps no longer read from disk upon execution
Eliminated sed call from shortmap loading

All substitutions are all native shell.
Cleanup and performance improvements
R (rebase) shortmap autocomp fix

Was renamed a number of git versions back; forgot to commit fix!
New S* shortmaps
`b` and `bv` shortmaps added
Numerous L* log maps

Removed useless `lh`. Capital `L` is used since `l` is a common Debian alias
for `ls`.
Added --help to alias command to output shortmaps

A co-worker suggested that the command mentioned in the alias provide some
sort of documentation, since that is the only reference the user has for
tracking it down.
Added missing copyright information
Shortmap additions and improvements
Added license to README.md
README.md updates and formatting
Added `?` shortmap