Anchor Click Event Propagates to element

This generates an issue with navigation on single page applications.
Added visual_anchor_class configuration option
Merge pull request #324 from nhammadi/master

Added visual_anchor_class configuration option
Prohibited mixed tabs and spaces in .jshintrc and fixed that in affected parts of the source files.
Fixed bug where WebKit/Blink browsers would scroll to the top of the editor when pasting into an empty element.
Fixed bug where removing the editor would cause an error about wrong document on IE 11 under specific circumstances.
Updated changelog.txt and fixed some logging issues in manual test file for paste.
Merge pull request #322 from joac/master

Prevent propagation of anchor click on table plugin
Re-factored the selection normalization logic and enabled it in EnterKey to work around #6688
Fixed bug where Gecko would place the caret at an incorrect location when using backspace.
Merge remote-tracking branch 'upstream/master' into seapine-4.x