TinyMCE library - upgrade to version 4.5.x

[Cecilia Vela Gurovic]

There is security patch in version 4.5.0

https://github.com/tinymce/tinymce/blob/master/changelog.txt

[Mahara Bot (dev-mahara)]

Patch for "master" branch: https://reviews.mahara.org/7521

[Mahara Bot (dev-mahara)]

Patch for "master" branch: https://reviews.mahara.org/7541

[Mahara Bot (dev-mahara)]

Patch for "master" branch: https://reviews.mahara.org/7542

[Mahara Bot (dev-mahara)]

Reviewed: https://reviews.mahara.org/7541
Committed: https://git.mahara.org/mahara/mahara/commit/3385df7796e6775eadf3b483810da7ac0d861646
Submitter: Robert Lyon (<email address hidden>)
Branch: master

commit 3385df7796e6775eadf3b483810da7ac0d861646
Author: Cecilia Vela Gurovic <email address hidden>
Date: Fri Mar 17 10:52:59 2017 +1300

Bug 1672893: Upgrading TinyMCE library to v4.5.5

no customizations, there will be made in another commit
to cherry pick from in next upgrades

Change-Id: I13901c30477dc3ffb8924934ef130896f7150357

[Mahara Bot (dev-mahara)]

Reviewed: https://reviews.mahara.org/7542
Committed: https://git.mahara.org/mahara/mahara/commit/b2b238942749872b39c39859cebf1b9557010f23
Submitter: Robert Lyon (<email address hidden>)
Branch: master

commit b2b238942749872b39c39859cebf1b9557010f23
Author: Cecilia Vela Gurovic <email address hidden>
Date: Mon Mar 20 10:14:47 2017 +1300

Bug 1672893: Upgrading tinyMCE to v4.5.5, adding customizations

* Added all of the language packs
original commit: 259a86431ad1140e15288d39702cea885c08f3fe

* Removed all .min.js and .dev.js files
* Removed all files in 'classes' directory since they're packaged into tinymce.js
* Removed all .less files from skin
original commit for the 3 above: 442ade4e7c7cf991a4001ab8f7cc9d15e2b25890

* Added code to spellchecker/spellchecker.rpc to use $CFG->spellcheckerengine
original commit: a42e68b43e4a63db19569facae61898af1b86d3f

* Adding the 'aria-hidden="true"' to presentation icons
original commit: 4ac89c31a719a9f63be6555c4d1a094fd2b09d0e

* Bug 1605110: Modified the "table" plugin to style the table through CSS instead of HTML attributes
original commit: 63f91a7ea8bd60c102e257c05678cc6d55e21683

* Add TinyMCE imagebrowser plugin: plugins/imagebrowser/plugin.js

* adding
plugins/imagebrowser (originally added in commit 36bc9f7d26076d74ebc6cd0672441eed8ed9cd2d)
plugins/mathslate (originally added in commit 325cdfac3dfba40efbbad8cd306dcfb385674709)
plugins/tooltoggle (originally added in commit 2c490a70bfff677c0b95c0565d39162c8c9bc10d)
skins/light (we use it but it's not included in new versions any more)
README.Mahara

* included in new library version but not added in ours
plugins/lists source files
not needed since they are all included in plugin.js file in same directory
plugins/media source files
not needed since they are all included in plugin.js file in same directory
plugins/wordcount source files
not needed since they are all included in plugin.js file in same directory
plugins/toc, new plugin "Table of content"
themes/inlite, we don't nee this, we use modern theme
themes/modern source files
not needed since they are all included in theme.js file in same directory

* have been removed in new version
plugins/layer removed in v4.5.0
plugins/media/moxieplayer.swf removed in v4.5.0
tinymce.jquery.js removed in v4.3.4

behatnotneeded: no functionality change

Change-Id: I1feb60471037183ac718c3841fbcf19f123a1bdd