Add poller service
Add convenience to remove all pollers.
Return promised NSTimer.
Add example project, implement tests for poller, fix poller based on test results.
Added a few extra tests for the poller
Add another test, as well as a poller on the TSNRESTManager. Fixes #13.
Merge pull request #28 from PAM-AS/poller

Poller feature
xcode f-up
Merge branch 'master' of https://github.com/PAM-AS/TSNREST
Update README.md
Update README.md
Merge branch 'master' into tests