Hotfix: Renamed max NSH argument variable to correct define
Merge pull request #297 from DrTon/sdlog2

sdlog2: new log messages added, ajustable log buffer
Hotfix: Make maxoptimization configurable from the shell via MAXOPTIMIZATION=-O0 V=1 make archives
Merge branch 'master' of github.com:PX4/Firmware
Merge branch 'master' into sdlog2