added coveralls to Travis-CI for java+groovy implementations
added coveralls badges
added coveralls badge for coverity_scan branch
fixed master branch coveralls badge URL
fixed broken build status table
removed coveralls from groovy implementation

jacoco is SKIPPED and corbertura does not find the .groovy files
Merge pull request #7 from bkimminich/develop

added coveralls.io reporting
Merge pull request #8 from bkimminich/master

added coveralls.io reporting