Created IME class in framework.
Revert "Created IME class in framework."

This reverts commit 4a550c2e428564b34eab090c85363fb9362f6eba.
Created IME class in framework.
Added a method in TeclaIME to emulate a back key.
Merge pull request #58 from ericwan78/issue-53

Create TeclaIME and wrote a method for back key emulation