[ticket/216] Add function for obtaining user's groups

B3P-216
Merge pull request #104 from marc1706/ticket/216

[ticket/216] Add function for obtaining user's groups
[ticket/217] Handle incorrect values in the news URL

The news module was actually comparing the id of the selected news
with the maximum allowed length of a news article.

B3P-217
Merge pull request #105 from marc1706/ticket/217

[ticket/217] Handle incorrect values in the news URL
Merge pull request #103 from marc1706/develop-2.1.x

Use flag SKIP_DOTS for RecursiveDirectoryIterator
[cleanup/acp] Make acp_portal module more readable
Merge pull request #106 from marc1706/cleanup/acp

[cleanup/acp] Make acp_portal module more readable
Merge pull request #108 from board3/master

Update develop-2.1.x