Fix bugs and enhance usability in image-plugin

Changes:
* Keep Aspect Ratio now works from the start if activated
* Keyboard-inputs for height/width are no longer auto-corrected when
  below minimum to avoid weird changes while still typing
* Toggling aspect ratio in crop-mode no longer breaks the plugin
* Field values are correctly updated after cropping and cancelling crop
* Gradually increasing size now works while keep aspect ratio is activated
* Several documentation fixes and minor refactoring
Fix image-demo by adding necessary paths
Fix bugs when resizing while keeping aspect-ratio

* Fixed problems when resizing and releasing mouse inside image
* Repaired toggle-button functionality
Squashed commit of the following:

commit 08e0b6156793f0d3998ce8b024e63fcdfd60ce62
Author: Clemens Prerovsky <c.prerovsky@gentics.com>
Date:   Mon Jan 7 16:27:59 2013 +0100

    made internationalization work

commit 94bd9dce75d8c2c49211e0a33bf4090d5b90fce8
Author: Clemens Prerovsky <c.prerovsky@gentics.com>
Date:   Mon Jan 7 16:27:52 2013 +0100

    made internationalization work

commit 1f2f05f15ebec612645437ccb53f893744468f34
Merge: 91a00c9 185e0fb
Author: Clemens Prerovsky <c.prerovsky@gentics.com>
Date:   Mon Jan 7 16:13:05 2013 +0100

    Merge branch 'hotfix-textcolor-plugin' of github.com:cprerovsky/Aloha-Editor into hotfix-textcolor-plugin

commit 91a00c927d41a3c52b5a5a0119f4ed2b3abd2b64
Author: Lakshan Perera <lakshan@web2media.net>
Date:   Wed Jan 2 22:41:46 2013 +0530

    Added the colorpicker plugin

commit 185e0fb371fad77b39aed933cee02dd12787185b
Author: Lakshan Perera <lakshan@web2media.net>
Date:   Wed Jan 2 22:41:46 2013 +0530

    Added the colorpicker plugin
Fixes lint error
Merge branch 'dev' of ssh://github.com/alohaeditor/Aloha-Editor into dev
Merge branch 'hotfix' of git://github.com/maschonber/Aloha-Editor into release
Prepared changelog for release
[maven-release-plugin] prepare release alohaeditor-0.22.7
[maven-release-plugin] prepare for next development iteration
[maven-release-plugin] prepare release alohaeditor-0.22.7-commercial
[maven-release-plugin] prepare for next development iteration
Refactors the format plugin

Behaviour was not changed. Only restructuring and removal of duplicate code.
Improves b/strong, i/em handling
Fixes javascript error
Merge branch master into dev

Conflicts:
	build/dev-changelog.md
	pom.xml
	src/css/aloha.css
	src/img/base.png
	src/lib/aloha/core.js
	src/plugins/common/format/lib/format-plugin.js
	src/plugins/common/ui/img/format-inline.png
Linting