fix($compile): link parents before traversing

How did compiling a templateUrl (async) directive with `replace:true` work before this commit?
1/ apply all directives with higher priority than the templateUrl directive
2/ partially apply the templateUrl directive (create `beforeTemplateNodeLinkFn`)
3/ fetch the template
4/ apply second part of the templateUrl directive on the fetched template
(`afterTemplateNodeLinkFn`)

That is, the templateUrl directive is basically split into two parts (two `nodeLinkFn` functions),
which has to be both applied.

Normally we compose linking functions (`nodeLinkFn`) using continuation - calling the linking
function of a parent element, passing the linking function of the child elements as an argument. The
parent linking function then does:
1/ execute its pre-link functions
2/ call the child elements linking function (traverse)
3/ execute its post-link functions

Now, we have two linking functions for the same DOM element level (because the templateUrl directive
has been split).

There has been multiple issues because of the order of these two linking functions (creating
controller before setting up scope locals, running linking functions before instantiating
controller, etc.). It is easy to fix one use case, but it breaks some other use case. It is hard to
decide what is the "correct" order of these two linking functions as they are essentially on the
same level.

Running them side-by-side screws up pre/post linking functions for the high priority directives
(those executed before the templateUrl directive). It runs post-linking functions before traversing:
```js
beforeTemplateNodeLinkFn(null); // do not travers
afterTemplateNodeLinkFn(afterTemplateChildLinkFn);
```

Composing them (in any order) screws up the order of post-linking functions. We could fix this by
having post-linking functions to execute in reverse order (from the lowest priority to the highest)
which might actually make a sense.

**My solution is to remove this splitting.** This commit removes the `beforeTemplateNodeLinkFn`. The
first run (before we have the template) only schedules fetching the template. The rest (creating
scope locals, instantiating a controller, linking functions, etc) is done when processing the
directive again (in the context of the already fetched template; this is the cloned
`derivedSyncDirective`).

We still need to pass-through the linking functions of the higher priority directives (those
executed before the templateUrl directive), that's why I added `preLinkFns` and `postLinkFns`
arguments to `applyDirectivesToNode`.

This also changes the "$compile transclude should make the result of a transclusion available to the
parent directive in post- linking phase (templateUrl)" unit test. It was testing that a parent
directive can see the content of transclusion in its pre-link function. That is IMHO wrong (as the
`ngTransclude` directive inserts the translusion in its linking function). This test was only passing because of
c173ca412878d537b18df01f39e400ea48a4b398, which changed the behavior of the compiler to traverse
before executing the parent linking function. That was wrong and also caused the #3792 issue, which
this change fixes.

Closes #3792
Closes #3923
Closes #3935
Closes #3927
fix(ngTransclude): detect ngTranslude usage without a transclusion directive

Closes #3759
docs($injector): Reword `fn` param docs and link to DI information
fix(docs.js): handle empty deps array for plunkr/jsfiddle

Change return value of docsApp.serviceFactory.prepareDefaultAppModule
to include empty array `[]` instead of array containing one empty
string element `['']`.

This will correct script.js for simple plunkr/jsfiddle examples such
as [ngChecked](http://docs.angularjs.org/api/ng.directive:ngChecked).
feat($sce): simpler patterns for $sceDelegateProviders white/blacklists

Closes #4006
refactor(select): simplify the ngOptions regular expression

\w matches [a-zA-Z0-9_] and \d matches [0-9], using both in a character set is
simply redundant.

Closes #3903
feat(filter): allow map of filters to be registered

This feature adds similar functionality to what `$ControllerProvider.register`
and `$CompileProvider.directive` currently provide by allowing a map of filter
name/factories to be passed as the sole argument to `$FilterProvider.register`
to register all of the specified filters.

Closes #4036
Closes #4091
refactor($ngAnimate): simplify the animation event rewrite

To avoid code duplication, use single variables for keeping
properties/events names to use. Also, fix some errors that have
happened after the rewrite from moment ago.
chore($ngAnimate): simplify vendor prefixes handling in tests
fix(dateFilter): allow negative millisecond value strings
chore: remove Firefox CORS workaround

See #1468
fix($httpBackend): don't send empty string bodies

The `XMLHttpRequest.send` spec defines different semantics for `null`
than for an empty String: an empty String should be sent with a
`Content-Type` of `text/plain`, whereas `null` should have no
`Content-Type` header set.

Closes #2149
fix($animator): avoid completing the animation asynchronously unless CSS transtiions/animations are present

Closes #4023
Closes #3940
chore(grunt): switch to the new //# sourceMappingURL pragma

All browsers except from Chrome implemented both the old
"//@ sourceMappingURL" and the new "//# sourceMappingURL" pragmas
in the same version so the only reason to keep the old one was Chrome.
However, Chrome 29, i.e. current stable version already supports
the new pragma so there's no need to wait any longer.
fix($httpBackend): set headers with falsy values

This is a breaking change. To migrate to the new behavior,
delete or set headers to `undefined` to avoid having them sent.
To restore the old behavior, override `$httpBackendProvider`
with the old implementation.

Closes #2984
docs(ngRoute): add angularEvent param to $routeChangeStart event

Adds missing implied first argument, `angularEvent`, to match
the rest of the `$routeChange` event documentation.
fix($compile): allow interpolations for non-event handlers attrs

Fix wrong behaviour that didn't allow 'data-on' and 'on' element attributes
to be interpolated by $compile. The regex now accepts any string beginning
with 'on' and with at least one more English letter.
feat($compile): support tel: links in a[href]

Allow `tel:` links so that click-to-call works in mobile browsers
test($sce): make ie8 happy

Ref: https://github.com/angular/angular.js/pull/4221#/issuecomment-25515813

Closes #4221
style($qSpec): add semi-colons