Set version to 0.2.0b1 for release prep.
Merge branch 'master' into versions/0.2

Conflicts:
	cmd/hekad/main.go
Merge branch 'dev'
Merge branch 'master' into versions/0.2
Merge branch 'dev'
Merge branch 'master' into versions/0.2
Add readme header
Merge pull request #161 from dasmoose/master

Add readme header
Merge branch 'dev'
Merge branch 'master' into versions/0.2
Move StatPacket channel initialization into the StatsdInput's Init method to avoid a
race condition where another plugin's Run method tries to access the channel before
the StatsdInput's Run method has initialized it.
Merge pull request #168 from mozilla-services/features/packet-chan-init

Move StatPacket channel initialization into the StatsdInput's Init metho...
First pass at converting TransformFilter into LoglineDecoder.
Move generally useful MessageTemplate type and InterpolateString function to
decoders.py for better visibility.
Fixup LoglineInput test for new decoder usage.
Added initial LoglineDecoder test.
Add Windows build documentation

- fix SIGUSR1
- generate lua_sandbox.go with cmake
Higher retry time.
Use plugin field consistently for Input() method.
Cleanup the Mac build

- use strlen instead of strnlen
- extern the circular buffer constants in the header