Added first version of FMU checker.
Merge branch 'master' into issue36_fmu
Added json output.
Reformated json output.
Added derivative and unused connector test. Improved test of simuation failure.
Corrected error in json syntax.
Added test of FMU export, and test for unspecified initial conditions.
Deleted json file.
Merge pull request #38 from lbl-srg/issue36_fmu

Issue36 fmu