Revert "Reversing the angular 1.2.0 upgrade because it breaks asset precompilation."

This reverts commit 7cbbcf747636df5b18628dce5e43e0db2011ed41.
CLC-2836 - Add AngularJS 1.2.0 again
https://jira.media.berkeley.edu/jira/browse/CLC-2836

This version removes the .map .min.js and .txt files that were causing pre-compilation errors
Merge pull request #1818 from christianv/CLC-2836

CLC-2836 - Add AngularJS 1.2.0 again …