Removed sInstance from TeclaAccessibilityService class.
Removed sInstance from TeclaIME class.
Merge branch 'develop' of https://github.com/idrc/tecla-framework into issue-232

Conflicts:
	package/tecla/addon/TeclaAccessibilityService.java
Recoded singleton variables.
Merge branch 'develop' of https://github.com/idrc/tecla-framework into issue-232
Merge pull request #234 from ericwan78/issue-232

fixes #232