Merge pull request #371 from AeroQuad/development

Preparing for version 3.1 release
Update README.markdown
Libmaple: cleaner fix for micros() race
AeroQuad32: launchpad compiler compatibility
Merge pull request #372 from kh4/forPat

Libmaple: cleaner fix for micros() race
updated various test sketches
added fix for receiver test sketch (receiverXmitFactor is initialized with 0.0)
removed unnecessary readme.txt
removing duplicated test sketches
fixed receiver test sketch for Futaba sBus
Merge pull request #373 from AQ-AirWolf/development

Updating/Fixing various test sketches
Merge pull request #374 from kh4/forPat

merge to devel too
Add back zero integral error on flight mode switch and change a bit default PID setting
Merge pull request #375 from Kenny9999/development

Add back zero integral error on flight mode switch and change a bit defa...
Merge pull request #376 from AeroQuad/development

Development
Merge branch 'master' of http://github.com/AeroQuad/AeroQuad