docs(overview): fix typo

Removed repeated "the" in the sentence: The input invalidates itself by turning red when you enter invalid data or leave "the" the input fields blank (Line 137).
docs(contribute): improve git instructions
docs(guide/di): fix typo
docs(guide): example filter does not conditionally assign a color
docs(guide): clarify example
style(input): remove ws
docs(ngList): fix example and add e2e test
test(ngList): remove disabled test

this test fails and we don't have intentions on making it pass since
we never made a commitment to implement this feature.
test(ngPattern): fix disabled test
chore(build): add check for merge conflicts, ddescribe, and iit
fix(scope): watches can be safely unregistered inside watch handlers

Closes #2915
feat(ngDocs): add links to source for API

 - add tests
 - the link points to the gruntUtil.getVersion().number tree on github
fix(ngValue): made ngValue to write value attribute to element
revert: feat(ngDocs): add links to source for API

This reverts commit 61fb5863df4afe0fad688a44ff78b245b8439db2.
fix(ngSubmit): expose $event to ngSubmit callback
fix(sanitize): match URI schemes case-insensitively

According to RFC 3986 (http://tools.ietf.org/html/rfc3986#section-3.1)
schemes such as http or mailto are case-insensitive. So links such as
http://server/ and HTTP://server/ are valid and equivalent.

Closes #3210
feat(Angular.js): skip JSON.stringify for undefined

Return early in `angular.toJson` if the object to be stringified is `undefined`.
IE8 stringifies `undefined` to `'undefined'` whereas other browsers return
`undefined`. This normalizes behavior and passes currently broken unit tests
in IE8.
fix(angular.equals): add support for regular expressions

Regular expression objects didn't used to be considered to be equal when using
'angular.equals'. Dirty checking therefore failed to recognize a
property modification.

Closes #2685

Conflicts:

	test/AngularSpec.js
style(ngMock): add missing whitespace
docs(di): promote registering controllers on modules