Adding sorting and default sort functionality.  Added some ReactableTestUtils to reset the environment and expect a row to have certain text to aid in testing this.
Fixing cosmetic issues with commit
Fixing build

changing node version in travis to 0.10
Merge pull request #12 from lofiinterstate/feature/sorting

- Adding sorting and default sort functionality. 
- Added ReactableTestUtils to reset the environment and expect a row to have certain text to aid in testing this.