[GRASS5] GRASS 5.7.0 beta3

[Radim Blazek]

http://mpa.itc.it/radim/grass-5.7.0beta3.tar.gz

r.countour - level as category and z (3D vector)
g.mapset - history not resolved, warning and hint printed
           in bash and tcsh
db.*, v.db.connect, v.database - default driver/database
           read from current settings

I want to release 5.7.0 June 9.

Radim