+ minor changes:
1) unify member field names: avoid _my*, replace by either _* or my*
2) BUG: mesh persistent ID is not unique
3) arguments alignement
4) Add SMESHDS_Hypothesis::SaveString() and LoadString()
5) In mesh construction dlg disable "Mesh Type" if it contains ANY only
6) Add SMESH::printErrorInDebugMode argument of SMESH_CATCH
7) Use static_assert to check completeness of arrays corresponding to enum
8) Add renumber arg to ExportUNV() and ExportDAT()
9) Fix some warnings
