Update of CMake helper macro for building simulators

* Added building of simulators doc
* Added built simulators tests
* Added built simulators installation
Update of URLs of web links

* Updated main URL
* Updated other URLs
* Cleaned duplicate URL management in config files

(closes OpenFLUID/openfluid#139)
Update of software information

* Updated AUTHORS file
* Updated Copyright information dates
* Switched to version 2.0.0~alpha5