AliInst: non-fatal if cleaning a non-installed mod
AliInst: "swallow" function with custom error msg
AliInst: explicitly tell user to source env first
AliEnv: fix comment relative to N_TRIAD
AliInst: ensuring minimum ROOT version

This is especially for OS X users who overlook installation
instructions.
AliEnv: retain system paths when cleaning
AliInst: removed debug output
AliInst: skip leading zeroes when parsing version
AliInst: fixed min ROOT ver for Mavericks/Yosemite
AliInst: nicer error if git-new-workdir not found
AliInst: removed SVN garbage
AliInst: same user can run many installs at once

Log files have current Bash PID prepended for uniqueness
AliInst: fixed -maxdepth position in AliEn cleanup
AliInst: Bash cleanup
AliInst: support Clang on Linux!
AliSplit: initial commit
AliSplit: restore initial clone
AliSplit: better regexp
AliSplit: no longer AliRoot-specific
AliSplit: fixed a wrong regexp