chore(Rakefile): skip build parallelization on Travis

Due to a infrastructure change on Travis starting JVMs in forked
processes doesn't currently work. Since we don't really care that
much about the build speed on Travis, I'm going to disable it there.

Related issue: https://github.com/travis-ci/travis-ci/issues/845
fix(angular.equals): relax the comparison for undefined properties

in 5ae63fd3 the comparison was made consistent but strict, so that

angular.equals({}, {foo: undefined}) // always returns false

this turns out to cause issues for data that is being roundtripped via network
and serialized via JSON because JSON.stringify serializes {foo: undefined} as {}.

Since angular.equals() behaved like this before the 5ae63fd3 in 50% of the cases,
changing the behavior in this way should not introduce any significant issues.

Closes #1648
docs(q): added testing information
fix(ngResource): correct leading slash removal.

Fixed an issues with ngResource param substitution where it was incorrectly removing leading slash when param was followed by a non-slash character.
Ex:
'/:foo/:bar.baz/:aux'

params = {
  foo: 'aaa',
  bar: undefined,
  aux: undefined
}

The above params were incorrectly producing '/aaa.baz' but now it results in '/aaa/.baz'.
chore(changelog.js): improve the changelog script
docs(changelog): release notes for 1.1.2 and 1.0.4
chore(release): cut the 1.0.4 bewildering-hair release
chore(release): update the CDN version
docs($injector): clarify $inject property description

Section heading about `$inject` property refers to it as `$injector` property.
docs(changelog): correct 1.0.4 release notes
docs(date): add missing doc about TZ behavior
fix(docs): properly generate angular.js urls in doc examples
docs(a): escape sample code in ng a directive