Correction of "Concave element ..." exception
Merge pull request #66 from l-korous/coupling

Add dllexport flags.
Merge branch 'coupling' of github.com:hpfem/agros2d into coupling
windows fixes
windows fixes
windows fix
windows fix
changed equations back to images (jax rendering was too slow on some systems)
windows changes
Update Windows DLL export/import definitions.