Added files, comments, and code

Created accel.c, accel.h, error_status.h, and added comments to all files except main.c.

Intial revisions include adding the accelerometer hander, some data types for the accelerometer and accelerometer data, as well as some error data types.

Code builds, but run time behavior has not tested.
Update accel.c
Updated some comments

Updated some comments and added subscribe service to main.c
Added function impl comment to accel.c
Prelim run time behavior of accel verified

Added a basic interface to block so accelerometer can sample. Sampled data through timer handle as suggested by Pebble SDK API, Sampled data is written to debug logs and can be viewed at run time through cloud pebble view logs functionality.
Update accel.c
Update main.c
format updates
Format updates .... again
Format updates .... again
update to support math.;h
Revert "update to support math.;h"

This reverts commit 6e70cb50c37b6bfcd9208a2d2ee586b0e4720e8e.
Added pebble_math files and support for sqrt
Added comments and start of data processing
Refined data collection slightly

Changing the ACCEL_THRESH in accel.h affects how steps is tabulated. Steps prints out into the app logs through debug
updated merge and some new functions

Increase and decrease functionality for refresh rate and threshold value. Added getter for threshold and refresh values as well.
Merge pull request #2 from jonpaco/watchapp

Watchapp