update dependencies

- update npm dependencies to latest versions
- fix some jshint errors
fix(test): new karma config

fix karma configuration to work with latest version
check whether i18next is loaded; defaultValue

- check whether i18next is loaded
- change order of defaultLoadingValue and defaultValue
add defaultValue example
v0.3.3

- update CHANGELOG
- add v0.3.3 release
- update package.json and bower.json