fixed issue with .gitignore
restructured bluetooth service/threads in old app
Added in popup window to app 2 which lists bluetooth devices; connectivity still needs to be implemented
app2 now connects to blutetooth, bluetooth portions in need of commenting, cleanup, final verification
code cleanup, commenting for bluetooth portions of app
refactored BT service to handle everything, instead of threads. allows for easier access to read/write to BT
Added previous calibration page to the new AndroidApp2
Merge branch 'bt2' of https://github.com/jtrovato/starfish-avocado into bt2

Conflicts:
	android_app2/src/edu/upenn/seas/senior_design/p2d2/HomeActivity.java
removed references to BTthread from HomeActivity and CalibrateActivity, did not make major logic changes.
Changed CalibrateActivity methods use BTConnectionService
Added write to bluetooth methods for different testing buttons, removed valve test.
added simple calibration routine to select ROI
isolated channels within ROI
isolated r g and b channels of the image
sensing fluorescence
changed BTReader to process packets from device, updated broadcast receivers in home activity
superimposed fluorescences values on channels
fixed zoom, wb, exposure, and cmaera locks
added more granularity to exposure
preparing for merge