Move REST exceptions to common package

Allows their use in gutterball resources.
Add a friendly description for compliance event.
Merge pull request #705 from candlepin/dgoodwin/compliance-description

Add a friendly description for compliance event.
Fixed path issue for API lib.
Merge pull request #706 from candlepin/mstead/script-path-fix

Fixed path issue for API lib.
Merge pull request #704 from candlepin/wottop/gutterball-rest-exceptions

Move REST exceptions to common package
use TC var for service as well as dirs
Merge pull request #710 from candlepin/ckozak/gutterball_tomcat_service

use TC var for service as well as dirs
Consumer Trend Report
Clean up report, move parseDate to Report.java
Add testing
Slight refactor and cleanup
aggregate for ids, requery for content
unescape result json to original form