Do not aloha'fy tables that are in blocks

When a table is rendered inside an aloha block, it should not be
editable.
Change Aloha-table arrows for ie7 - set another default-value
Merge branch 'hotfix' of github.com:alohaeditor/Aloha-Editor into hotfix

Conflicts:
	build/hotfix-changelog.md
Landing GH#831

Merge branch 'hotfix-ie7-table-arrows' of github.com:stefanbinder/Aloha-Editor into hotfix

Conflicts:
	build/hotfix-changelog.md
Refactor paste plugin documenation; remove obsolete README.md
Fix capitalization typo
Fix getEditableHost() to find closest editable

jQuery.fn.parents() guarentees that it will return "a new jQuery object from the
matching elements ordered from immediate parent on up; the elements are returned
in order from the closest parent to the outer ones."

But by using jQuery.fn.andSelf() (which internally used jQuery.fn.add()), the
order of the matched elements was being reversed.  This meant that
getEditableHost() would retrieve the furthest editable host rather than the
nearest.
Fix selecting w/ <CTRL>+A inside nested editables

When the selection is inside of a nested editable, <CTRL>+A should only select
all of the contents of the immediate editable, rather than all the contents of
parent editables as well.
Improve validation plugin documentation
Move <Ctrl>+a selection behavior to editable.js

... and have it in effect for all editables--not just nested ones.
Fix exception caused by typo in variable name
Fix floating algorithm to keep surface in viewport
Clean up floating.js: documentation and linting
Remove accidental line of code
Move copypaste utilities from util/ into aloha/
Refactor getRange() to use selection api
Added support for drag & drop cell resizing in Aloha table plugin
Refactoring resizing code to resize without expanding the table itself
Finished refactoring row/column resize
Removed unwanted options