Update version.ads for 0.31 branch
Updated copyright dates in ghdl-0.31
Removed tag 0.31rc1
Added tag ghdl-0.31_release for changeset dab8e...
Added tag ghdl-0.31 for changeset 256c0e270ce2
Removed tag ghdl-0.31
Version 0.31dev, builds with gcc4.8
Fix for https://gna.org/bugs/?18351