Textinput: added tabindex -1 on clearbuttons

Closes gh-7155
Fixes gh-6467
Textinput: Add aria-hidden="true" to clear button and test correct markup

Closes gh-7647
Listview: Fixed a typo in autodividers selector demo

Fixes gh-7650
Closes gh-7651
Toolbar: Demo the use of custom CSS to add left/right buttons to footer

Closes gh-7635
Fixes gh-7634
Navigation: Correctly (un)escape data-url all throughout the code

Also removes code dealing with nested list URL tokens (subPageUrlKey)

The initial bug was regarding the need to use selector-escaping when looking
for pages inside the DOM via their data-url attribute, because the the data-url
may contain "weird" characters like parantheses, single, and double quotes.

During the process of fixing this it became clear that the data-url attribute
can sometimes end up having a URL-encoded value - but not always. This makes
proper string comparison, much less selector-escaping, impossible. So, it
became necessary to require that data-url never be url-encoded.

Conversely, the URL that ends up in the location when using replaceState() must
be URL-encoded, otherwise, upon deep linking, one may end up with an invalid
URL. For example, if the URL contains an actual percent sign, and the URL is
placed in the location via replaceState(), the percent sign must be URL-encoded
in order for deep-linking to work.

Below are the original commit messages that have been squashed:

Pagecontainer: Escape dataUrl when trying to find page based on it
Navigation: Make sure location is encoded when going to a funky page
Pagecontainer: Test that _find() throws not when looking for weird URLs
Init: Correctly assign data-url for initial page
Init: Make sure "data-url" attribute for initial page is decoded
Pagecontainer: Decode URI when assigning to "data-url" during _parse()
Pagecontainer: Use decoded URL to build selector for data-url
Pagecontainer: Call convertUrlToDataUrl() via _createDataUrl()
Path: Always uri-decode when computing dataUrl
Pagecontainer: Remove extra decoding step, now part of _createDataUrl()

This also removes the possibility that a URL gets double-decoded.
Pagecontainer: Test behavior of _find() in the face of weird URLs
Navigation: Use data-url retrieved from Ajax request in its encoded form
Pagecontainer: Pass encoded URL to $.mobile.navigate()
Init: Rename JS file with spaces in it

Closes gh-7474
Fixes gh-1383
Textinput: Only _destroy() clear button when present

Closes gh-7568
Fixes gh-7567
Toolbar: Sorts our proper destroy methods for toolbar and fixedtoolbar

Fixes gh-6987
Fixes gh-6939
Closes gh-7252
Slider: change event is too greedy with mouse drag

Fixes gh-7649
Closes gh-7653
Build: Updated authors list
Contributing: Replaced the reference to PhoneGap with Apache Cordova

made replacement

Fixes gh-7764
Closes gh-7766
Build: Upgrade to commitplease 2.0.0

commitplease now accepts "[tmp]:" and similar to temporary commits,
useful while updating pull requests that are squashed later.
Init: Stop QUnit while asynchronously loading unit test dependencies

Fixes gh-7790
Demos: Add backbone demo listview classes a priori

Closes gh-7782
Fixes gh-7719
Build: Correctly transform structure CSS references in the demos

Closes gh-7778
Fixes gh-7771
Demos: Move external references to cdn.rawgit.com

Closes gh-7768
Fixes gh-7767
Filterable: <select> filtering does not work on all platforms

Closes gh-7747
Fixes gh-7744
Controlgroup: Honor keepNative even for buttonMarkup()

Closes gh-7683
Fixes gh-7676
Panel: Invalidate _openedPage upon pageshow before recomputing wrapper

Fixes gh-7711
Navigation: Hash processing demo updates page halfway through transition

Closes gh-7792
Fixes gh-7775
Loader: Attach to body when no $.mobile.pageContainer found

Closes gh-7761
Fixes gh-7760