Added correct urls for doxygit.

Change-Id: I5e67d2ef7c1cf322122a6e1147660a9f79661f48
Merge pull request #81 from rdumusc/project-quality

Added correct urls for doxygit.
Merge branch 'master' of github.com:BlueBrain/DisplayCluster
Merge pull request #80 from tribal-tec/master

Fix overloaded-virtual warning
Updated gitexternals to latest version to generate documentation version 0.3.0

Change-Id: Ic77ff5a09cc66b7474aef19182d2782047346b1e
Merge pull request #82 from rdumusc/project-quality

Updated gitexternals to latest version to generate documentation version...
Merge branch 'master' of github.com:BlueBrain/DisplayCluster
Fix build w/o core library

Change-Id: I89612f2e9238dfe540e1c9be29b447ec6ac40633