release-0.4.0

New API:

• MDAL_DR_SaveMeshCapability - save mesh structure to file. Implemented for 2DM driver
• MDAL_G_referenceTime - return reference time for dataset group. Implemented for Hec-Ras, ascii/binary dat, xmdf

Enhancements:

• New format supported: ESRI Tin
• Improve conformance with UGRID standard

Bug fixes:

• fix for SELAFIN driver (French chars)
• fix crash for face SWW datasets
• reading of TIMEUNITS for ascii/binary dat files, xmdf