Stopped keyboard from self-scanning when HUD is disabled.
Merge branch 'issue-275' into issue-297

Conflicts:
	package/tecla/addon/SingleSwitchTouchInterface.java
Merge branch 'issue-238' into issue-297-test
Merge branch 'develop' of https://github.com/idrc/tecla-framework into issue-297
Merge pull request #300 from ericwan78/issue-297

fixes #297