changed __ to _ in order to get access to private methods and attributes
Removed unused method argument in _setTemporaryDirectories()
Adding JModelica compilation and extracting simulation start- and stoptime from .mos
replaced class data by dictionary
Testing compliance in JModelica.org
Added doctests and unittests.
Added doctests and unittests.
Merge pull request #13 from saroele/unittest_jmodelica

JModelica compliance check and some code cleaning
Fixed wrong function arguments and removed debug statement.
Replaced call to non-existent function dat.setResultDirectory.
Removed float operator as valueString can have a mathematical expression.
Resolved conflicts.
Renamed unittest to regressiontest for doctest to work.
Added validation of all modules in development package.
Removed unrequired development/data.py module.
Removed change of font as this requires (on Linux) dvipng, which may not be installed on a user's computer.
Added commands to remove directories generated by running the unit tests.
Cleaned up use of working directory.
Change comment to state that the method is deprecated.
Changed import to use regressiontest instead of unittest.