Reviewers: David C.

Changelog:
- Fixed an issue with buffer clear
- fix issue with TCP socket call backs (All the callbacks were called
  whenever one of them should be called)
- refactor TCP socket callbacks

Test Cases:

- make sure you can successfully build tibb and tibbtest
- use app.js (as server) and client.js (as client) js files attached to
  jira task
- run app on emulator
- run client.js with node
- make sure client and server received data and connected call back is
  called
- make sure error callback is not called
- make sure when you press button it sends data to the client

Test Case