Updated Readme.md
Updated Readme.md

- travis badge
- install instructions (#23)
- custom filename/contentType example
- todo, license (#14)

forio/node-form-data,omkarkhair/node-form-data,form-data/form-data,morpheus-med/node-form-data,treygriffith/node-form-data,alexindigo/form-data,D1plo1d/node-form-data,sqreept/node-form-data,amberdixon/node-form-data,zubairov/node-form-data,LinusU/node-form-data,felixge/node-form-data,sylvaingi/node-form-data,UndeadKernel/node-form-data,jteplitz602/node-form-data