Updated versions.txt for 0.87-beta notifications
Merge branch 'armoryd'

Some under-the-hood updates for handling reorgs and file splits better.
Also added "fragmented backup" command-line utility.   See the extras/
directory (frag and unfrag.py)
Signed Bitcoin-Qt installer hashes in versions.txt
Added version number and comments to Satoshi download list
Updated versions.txt signed data for extensibility
Almost final commit before release!  v0.88-beta
Merge branch 'master' into testing

Conflicts:
	versions.txt