Adds commons HTTP client back into pom.xml

Fixes yet undiagnosed segmentation fault on launch. To be removed with OAuth components.
Merge pull request #143 from mapzen/chuck/add-apache-http-back-to-pom

Adds commons HTTP client back into pom.xml
Adds ShadowBugSenseHandler.

Stubs BugSense background calls.
Declare ShadowBugSenseHandler as final

Fixes checkstyle error
Merge pull request #144 from mapzen/chuck/shadow-bugsense

Adds ShadowBugSenseHandler.
Adds clickhandling to poi rendered in the vtm map