feat(parser): Add support for named arguments.

Closes #762
fix(ng_mustache): actually assign to _hasObservers
fix(mustache): fix regression that fired an initial empty string

Closes #734
feat(expect): Move JQuery.text to Expect.toHaveText() and element.text

For #219
chore(karma): set up default dartium browser for karma
doc(README): switch to .svg for Travis badge

It will become the default soon
doc(IDE): add the Karma configuration for WebStorm