Merge pull request #8 from pooler/master

0.8.4.1 gitian sigs from pooler
0.8.4.1 gitian sigs from thrasher
Merge pull request #9 from thrasher-/master

0.8.4.1 gitian sigs from thrasher
0.8.5.1 gitian sigs from thrasher
Merge pull request #10 from thrasher-/master

0.8.5.1 gitian sigs from thrasher
0.8.5.1 gitian sigs from wtogami
0.8.5.1 gitian sigs from weex
Merge pull request #11 from weex/master

0.8.5.1 gitian sigs from weex
Ken Miyamoto 0.8.5.1 gitian sigs
Update README.md
README.md: Update boost download instructions
README.md: update the zlib download link
Merge pull request #12 from kenmiyamoto/master

Ken Miyamoto 0.8.5.1 gitian sigs
0.8.6.1 gitian sigs from wtogami
Fetch and build inputs steps were not up to date so I fixed it
piotrnar's gitian sigs for v0.8.6.1
wtogami's gitian.sigs.ltc for v0.8.6.1 (fixed broken win32 deps)
README.md: create virtual machines, move SIGNER and VERSION later
wtogami's gitian.sigs.ltc for v0.8.6.2
README.md: Upgrade to boost-1.55.0