Added a global home action when TeclaAccessibilityService connects.
Added methods to send global home and back actions.
Use global home and back actions on the HUD selections.
fixes #167
Fixes #169
Add build directory to hold development app builds for testing
Merge pull request #184 from jorgesilva/develop

Add build directory to hold development app builds for testing
Merge pull request #173 from ericwan78/issue-170

fixes #170
Merge pull request #175 from ericwan78/issue-174

fixes #174
Merge pull request #178 from sagarchandarana123/issue169

Fixes #169
Merge pull request #179 from sagarchandarana123/issue167

fixes #167
Merge branch 'develop' of https://github.com/idrc/tecla-framework into issue-182

Conflicts:
	package/tecla/keyboard/TeclaAccessibilityService.java