Add oledOn() and oledOff() functions to turn display on and off.
Fix comment for oledOn()
Add initial description for the OLED library operation
Fix type in OLED readme
Add a first, hacky version of chrome app

Add a first, hacky attempt at a chrome-app that can communicate with the
mooltipass device over USB.
Read the correcct number of bytes

The MP device sends 64 bytes with each reply, not 65. Also, the command should
be in the second byte of the package, not the third.
Remove disused code
Merge pull request #50 from abbeman/master

Add a first, hacky try at a chrome-app
Added oledGetTextWidth() and oledGetTextWidth_P() functions to return the pixel width of a string.  The functions support printf operations and will do the argument substitution before calculating the text string width.
Removed testing comments from node_mgmt.h
Ported scanParent to scanChild. Added TODO comment

TODO -> handle memory collision in a more robust way.  May need to add
info into the handle / reserved memory to better handle the collision.
ported more parent node functions

Create, Read, and Invalidate.
Started port of delete.
Added prototype for port of update.
Added defines about child structure size.

Builds
First full commit of child node port

Data child nodes are currently not supported.  Basic Credential sets
only.

TODO:
1) Add robust checking of parent / child node relations/
2) Relocate initial scanning of parent / child nodes only occur when
needed
3) Allow current child node implementation to be used as child start of
data
4) Implement data nodes (tied w/ 3)
Merge pull request #51 from mikeneiderhauser/master

Node Management - Child Node Support
Fix braces