chore($compile): remove dead code
style: strip white space from files
fix($compile): make order directives w/ same priority deterministic

Array.prototype.sort is speced out to be as potentionally unstable sort,
which is how it's implemented in FF and IE. This has caused the order
of directives with the same priority to vary between browsers.

For consistency sake, we now consider directive name and registration,
order when determining the order of directives with the same priority.

Note: it is still possible to get into a situation when the directive
order is underministic - when source files are loaded asynchronously
in non-deterministic order and there are are directives registered
with the same name and priority, the order in which they will be applied
will depend on the file load order.
fix(directives): correct priority of structural directives

BREAKING CHANGE: the priority of ngRepeat, ngSwitchWhen, ngIf,
ngInclude and ngView has changed. This could affect directives that
explicitly specify their priority.

In order to make ngRepeat, ngSwitchWhen, ngIf, ngInclude and ngView
work together in all common scenarios their directives are being
adjusted to achieve the following precendence:

Directive        | Old Priority | New Priority
=============================================
ngRepeat         | 1000         | 1000
---------------------------------------------
ngSwitchWhen     | 500          | 800
---------------------------------------------
ngIf             | 1000         | 600
---------------------------------------------
ngInclude/ngView | 1000         | 400
fix($compile): abort compilation when duplicate element transclusion

Issue an error and abort compilation when two directives that ask for transclusion are found
on a single element. This configuration is not supported and we previously failed to issue
the error because in the case of element transclusion the compilation is re-started and this
caused the compilation context to be lost.

The ngRepeat directive has been special-cased to bypass this warning because it knows how to
handle this scenario internally.

This is not an ideal solution to the problem of multiple transclusions per element, we are
hoping to have this configuration supported by the compiler in the future. See #4357.

Closes #3893
Closes #4217
Closes #3307