Features/cr118 proxy

#118 Add proxy feature to EclipsePmi.

#118 Add proxy feature to Hudson.

#118 Add proxy feature to PmdAnalysis.

#118 Add proxy feature to StackOverflow.

#118 Add proxy feature to SonarQube45.

#118 Add proxy feature to ProjectSummary.

#118 Update/Fix proxy feature to EclipsePmi.

#118 Update/Fix url recognition in proxy feature.

#118 Add proxy feature to JiraIts.

#118 Clean proxy feature in Hudson plugin.

#118 Fix tests for proxy feature.

#118 Fix tests for proxy feature.

#118 Add http_proxy env var in Tools::Git.