Fix of wrong test name

(references OpenFLUID/openfluid#166)
Add ability to set DateTime from a string and a string formatter
Refactoring of injection/interpolation tools and generators

* Added new tools
* Removed deprecated tools
* Updated existing tests
* Added new tests

(references OpenFLUID/openfluid#29)
Fix of Fortran simulator for tests
Add ability for fixed and random generators to run with own DeltaT

* Added deltat parameter to fixed and random generators
* Fix of generators consistency checking in OpenFLUID-Builder
* Updated tests
* Cleaned code

(closes OpenFLUID/openfluid#29)
(closes OpenFLUID/openfluid#161)
Switch to version 2.0.0~beta3

* Updated CHANGELOG and README files
Rename of BuilderUnit class into AdvancedUnitDescriptor
Update of KML observers for polygons filling

* Modified generated KML styles
* Allowed multiple use of same KML observer in monitoring
* Cleaned code

(closes OpenFLUID/openfluid#228)
Add current time index as available date format in CSV observer

* Updated observer and tests datasets

(closes OpenFLUID/openfluid#230)