ci(travis.yml): Update the version of firefox and node

fix(DateObject): localDateValue() returns the wrong value for some da…

…ys if there is a daylight savin

Now it uses the timezoneOffset of the specific day to calculate the localDateValue

Closes #345

fix(minification): Add ; to beginning of IIFE's to the code will conc…

…atenate and minify correctly.

Since removing all semi-colons, the IIFE's must start with a semi-colon so the parser will correctly

terminte intermediate values.

fixes #338

fix(travis): Set node version to 6

feat(DateObject, html, css): Current date has light gray background i…

…n week view.

The current date has a light gray background only in the week view. If the current date is selected,

then the .active date highligh overrides the light gray background.

Closes #202, #249

fix(annotations): Add missing inject annotation to the DirectiveContr…

…oller

Without this annotation, the minified code will not work properly. Reported by @mattlewis92

Closes #271

chore(coverage-threshold): Increase branch coverage threshold to 100%