adding the new block types to watchedblocks.txt

[Anna Bakker]

original issue: http://code.minecraftonline.com/griefalert/issue/11/stained-glass-and-probably-all-the-other

New blocks need to be added to watchedblocks.txt for griefalerts and logging broken blocks.

[Riot]

adding 1.7 and 1.8 blocks to griefalert logging, resolves #141

→ <<cset a66d029268e4>>