Merge pull request #100 from deba/komal

Merge pull request #99 from deba/kiran
The constant added for message & message participants
Merge pull request #101 from deba/kiran

Kiran
Merge pull request #102 from deba/milind

Merge pull request #101 from deba/kiran
Merge pull request #103 from deba/kiran

Pulling all the changes from Kiran branch