Extract SDK for 3rd-party use.

Barely functional for CSUN13 demo
Merge pull request #163 from jorgesilva/csun13-demo

Functional 3rd-party app support implementation
Highlight color changed from Reg to Blue

Changes in the PNG resource-files. No chnage in code
Merge pull request #165 from sagarchandarana123/issue159

Highlight color changed from Red to Blue. Fixes #159
hotfix: Avoid initiating highlight on null keyboard view