Fixed some warnings.
[FIXED JENKINS-18084] Added support for errors in CLang parser.
[FIXED JENKINS-18081] Added support for errors in GCC parser.
Remove .DS_Store.
[FIXED JENKINS-17788] Use JS-Lint parser when parsing CSS-Lint files.
Merge branch 'master' of git@github.com:jenkinsci/warnings-plugin.git
Do not check for null when using StringUtils.
Merge branch 'master' of git@github.com:jenkinsci/warnings-plugin.git
Improved performance of Pep8 parser.