Add a test button to each subscription

Should fix #197
Merge pull request #213 from obazoud/test_button

Add a test button to each subscription
Change pom version - fix #219

Should be 1.2.0-SNAPSHOT because 1.1.0 tag already exists - https://github.com/scobal/seyren/releases/tag/1.1.0
Merge pull request #220 from obazoud/fix_pom_version

Change pom version - fix #219
Travis CI build status
Merge pull request #221 from obazoud/badge

Travis CI build status
Update README.md