fixed junit test
upgrade diff package to version 2.0 (documentation missing), fixed junit, fixed tk_tunnel test
added multiline support for diff
added most diff documentation, added several new diff tests, and reindexed
updated diff documentation
updated diff readme and add compare_dirs
merged upstream changes
Merged pull request 271
Removed exit statement from test.tcl
Updated commit_id for junit & diff for 2014.3
Merge pull request #272 from dpefour/master

Merged pull request 271 and updated 2014.3 catalog for diff/junit