Implemented proper safe support for long log messages utilizing ThirdParty/c99_snprintf. See #2570
Updated standard header files to be in sync with the version from April. 
Note that RC1 needs another update. 
Ticket #2900
Add undefined for platform types in fmi1_types.h/fmi2_types.h (FMIL) See #2682
Set defaultExperiemnt default to be 1e-4. See #2909
Marked FMIL 2.0a3 in the Readme, see #2898