Merge tag '0.2.4' into develop

update to c3 v0.4
add dataset watcher
update dependencies
Fixed Bug #31 from https://github.com/maxklenk/angular-chart/issues/31
Merge pull request #32 from ulilicht/develop

Fixed Bug #31 from https://github.com/maxklenk/angular-chart/issues/31
Exposed the "resize()" function of c3 to outside.
add options.size and options.resize with tests and documentation
Merge branch 'ulilicht-develop' into develop
added .editorconfig closes #35
reformatted code based on new .editorconfig
add version number 0.2.5
Merge branch 'release/0.2.5'