Docs: Fix link in handlebars text field API

Currently, this link was returning a 404 response. It should be
relative to the /api/classes path. This change fixes the link.
[BUGFIX beta] Correct type of variable initialization

`allowedKeys` should be a string value because it will be passed from template.

Such as:
``` handlebars
<a href="#" {{action "edit" allowedKeys="alt"}}>click me</a>
```

If it is treated as an array, [`allowedKeys.indexOf`][] doesn't work on old IE.
Because `Array#indexOf` is not defined in old IE.

[`allowedKeys.indexOf`]: https://github.com/emberjs/ember.js/blob/a51806a2cdc2fc93f8ed3fe6d0d53ab229c455d3/packages/ember-routing/lib/helpers/action.js#L48
Merge pull request #3730 from tricknotes/fix-for-ie8

[BUGFIX] Correct type of variable initialization
Revert "[BUGFIX beta] Correct type of variable initialization"

oops should actually only be [BUGFIX] - @stefanpenner

This reverts commit 34eed4362088978b4558b856cb1136181d085640.
[BUGFIX] Correct type of variable initialization

`allowedKeys` should be a string value because it will be passed from template.

Such as:
``` handlebars
<a href="#" {{action "edit" allowedKeys="alt"}}>click me</a>
```

If it is treated as an array, [`allowedKeys.indexOf`][] doesn't work on old IE.
Because `Array#indexOf` is not defined in old IE.

[`allowedKeys.indexOf`]: https://github.com/emberjs/ember.js/blob/a51806a2cdc2fc93f8ed3fe6d0d53ab229c455d3/packages/ember-routing/lib/helpers/action.js#L48
[BUGFIX beta] Add spec for unhandled exception being logged by Test.adapter.exception

The changes in exception handling introduced in
cf0caa04f625067ec3b4629acdec12c8517df94e made a test assertion in an
existing test obsolete, since it wasn't called anymore.

This commit adds a spec for Test.adapter.exception being invoked, when
an exception is not handled.
[DOC] What a Hampster is?
[BUGFIX beta] Enumerable#any no longer returns false if NaN is matched

Fixes #3736
Merge pull request #3735 from thenickcox/fix_handlebars_link

Docs: Fix link in handlebars text field API
Merge pull request #3705 from pangratz/fix/spec_for_unhandled_exception

[BUGFIX beta] Add spec for unhandled exception being logged by Test.adapter.exception
Correct GH issue URL referenced in blockHelperMissing comments
[BUGFIX beta] {{partial}} helper now works with bound params

{{partial name}} will look up `name` on
the present template context and render the partial
whose name is the present value of `name`. If `name`
changes, the partial gets re-rendered. If name is
falsy, nothing gets rendered. If name refers to a
non-existent template/partial, the same assertion you'd
see if you'd explicitly passed in an invalid template/partial
name in string form will fire.
[BUGFIX beta] Use RegExp.test() for Ember.computed.match.

After a bit of research I believe that `RegExp.test` is quite a bit
faster and results in clearer code (as it returns a boolean instead of a
match array).

Quote from the MDN article on `String.match`:

    If you need to know if a string matches a regular expression regexp, use
    regexp.test(string).

Supporting research:

http://jsperf.com/test-vs-match-regex
https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/RegExp/test
ttp://stackoverflow.com/a/10940138/1157494

Resolves #3746.
Merge pull request #3756 from rjackson/use_regexp_test_for_computed_match

[BUGFIX beta] Use RegExp.test() for Ember.computed.match.
Merge pull request #3745 from machty/bound-partial-helper

[BUGFIX beta] {{partial}} helper now works with bound params
[DOC] Add missing link to handlebars.helpers.input in Ember.Checkbox.
Revert "Docs: Fix link in handlebars text field API"

This reverts commit c9be7cf1b968286dd507736076ff70219ad7ddee.