feat(.jshintrc): add .jshintrc

add .jshintrc to force coding style

Closes #17
feat(.bowerrc): add .bowerrc

add .bowerrc to define component directory
update karma.conf.js to search for libs in bower_components folder

Closes #16
Merge branch 'jshintrc'
feat(bower.json): rename component.json to bower.json

- change pkg property bower.json
- add bower_components to .gitignore
Update changelog and package files
Merge branch 'master' of github.com:PascalPrecht/ng-translate
fix(translateDirective): check for truthy value in watch callback

- check if the watched value is truthy
- only replace contents with translation if truthy

Closes #18
Bump version; Update changelog