added barcodescanner/barcodeinvoker samples; code style fixes; pushcollector tweaks/fixes; SensorDemo fix for compass image when upside down; dictaphone fix to use data folder for recording to prevent restrictions on signed builds
Merge pull request #65 from CodeHoarder/master

Two new samples - barcodescanner/barcodeinvoker; the rest were fixes and tweaks.
Merge branch 'master' of git://github.com/blackberry/Cascades-Samples