Add `ost` and `ost.` shell aliases.
Add eclipse-wipe-jdt-index script.
Warn if USER_LIBRARY is unusable.
Fix use of `find -L` in findr function.
Remove obsolete `clm` Git alias.
findr uses -L to traverse symlinks
Remove Subclipse and Perforce update sites.
Add `git cob` alias to checkout and branch.