[CDE-322] - Improved security check for access to files inside of system. Now only files that are within a Sparkl plugin directory are accessible without admin rights.
[CDE-322] - getSparklPluginIds now caches the results obtained on its first execution.
Merge pull request #43 from graimundo/master

[CDE-322] - Now only files that are within a Sparkl plugin directory are accessible without admin rights.