Add a property for configuring additional branch tabs
Use Regex matching for branch names
Use newline as seperator for branches
Use new url scheme for branch tabs

Using doDynamic was causing request to be abandoned if it didn't match
branch tabs.
Merge branch 'master' into branch_tabs

Conflicts:
	src/main/java/com/groupon/jenkins/dynamic/build/repository/DynamicBuildRepository.java
Merge pull request #75 from groupon/branch_tabs

Add ability to create additional branch tabs based on a regex