travis ci: adding badge

updating for travis ci
- update .travis.yml to use correct modules for 0.8 testing
- update .gitignore
- update readme
travis ci: update readme
Merge pull request #39 from vernak2539/travis-update

travis ci: adding badge
Release 0.5.1
The fuel token routes support an optional scope
Fixing linting errors
Merge pull request #40 from tweettypography/master

The fuel token routes support an optional scope
Release 0.5.2