Added error handling. Streamlined edge cases behavior.

#38 Added check for array data type.
#40 Added check for attached streams in getLengthSync.
- Emits error in both cases.
Merge branch 'master' of github.com:felixge/node-form-data into 0.1.0
Updated readme.
Made tests more deterministic.
Fixed styling.
Merge pull request #43 from alexindigo/0.1.0

0.1.0 - Added error handling. Streamlined edge cases behavior.
Merge pull request #44 from felixge/0.1.0

Update master to 0.1.0