Fix compilation errors, optimise imports.
added annotation config
Updated exception msg.
 Issue #9 fix.
updated javadoc
migrate to jackson 2.x, fix compilation errors, started working on status operations api
added xml config, fixed typos
optimise imports
small refactoring
updated method signature
removed status operations
small updates
moved to proper package
test jenkins
test triggering jenkins
upgraded gradle wrapper
added authorization unit tests.
extended properties for Wall.post
Merge remote-tracking branch 'upstream/master'