Merge pull request #46 from schildbach/master

Andreas' signatures for 0.9.2.1.
v0.9.2.1 signed with codesigning key, itself signed by -otc key
v0.9.2.1-win sigs, signed with key, itself signed by -otc key
v0.9.2.1 for osx, signed with code signing key, itself signed by -otc key
laanwj signatures 0.9.3
gavin gitian results
cfields 0.9.3rc1 signatures
fanquake signatures 0.9.3rc1
Gavin OSX results
Merge pull request #51 from theuni/cfields

cfields 0.9.3rc1 signatures
Merge pull request #52 from fanquake/fanquake_0_9_3rc1

fanquake signatures 0.9.3rc1
Merge pull request #47 from midnightmagic/v0.9.2.1-sig

v0.9.2.1 signed with codesigning key, itself signed by -otc key
Merge pull request #48 from midnightmagic/v0.9.2.1-osx-sig

v0.9.2.1 for osx, signed with code signing key, itself signed by -otc key
Merge pull request #49 from midnightmagic/v0.9.2.1-win-sig

v0.9.2.1-win sigs, signed with key, itself signed by -otc key
Michagogo's gitian sigs for v0.9.3rc1
Merge pull request #53 from Michagogo/master

Michagogo's gitian sigs for v0.9.3rc1
Replace outdated excerpt of release process with links
Andreas' signatures for 0.9.3rc1.