updating instructions to add sdk to existing projects
Merge pull request #49 from akhileshgupta/master

updating instructions to add sdk to existing projects
fixing typos
Merge pull request #50 from akhileshgupta/master

fixing typos
Binaries for 2.3.1 patch
Merge pull request #53 from khawkins/231_patch

Binaries for 2.3.1 patch
Update SDK commit