[GRASS5] GRASS 5.1 draft tutorial available

Dear (potential) GRASS 5.1 testers,

a draft, incomplete GRASS 5.1 tutorial is available now:
http://grass.itc.it/grass51/tutorial/

describing
- geometry storage (native, SHAPE, PostGIS) and
- attributes storage (DBF, mySQL, PostgreSQL, ODBC)
- some examples

From time to time I will update and extend it.

Comments to improve it are welcome,

Markus