Bugfix/buglink regex: allow ':' before list of bug ids
Bugfix/buglink regex: allow ':' before list of bug ids

Per @gquipster's suggestion in #106

bright-tools/source-integration-fixes,bright-tools/source-integration,morgant/source-integration,mantisbt-plugins/source-integration,bright-tools/source-integration,make-all/source-integration,bright-tools/source-integration-fixes,bright-tools/source-integration,mantisbt-plugins/source-integration,morgant/source-integration,dregad/source-integration,morgant/source-integration,mantisbt-plugins/source-integration,make-all/source-integration,dregad/source-integration,bright-tools/source-integration-fixes,dregad/source-integration,bright-tools/source-integration,make-all/source-integration