The Standard way to select multi elements on Mac is 'Cmd' + click. Support that.
Merge pull request #1 from pubannotation/mac_cmd_key

Support 'Cmd' + click.
Change the style of relations at the relation-edit-mode.
Set the default width of relations 1px from 4px.
Merge pull request #2 from pubannotation/relation_hover_style

Relation hover style
Remove unused values from config files.
Empty annotations of the second editor.
The type of entity must be string.
Set default value of defaultType of the type and the relation 'something'.
Merge pull request #3 from pubannotation/bug_fix_first_annotation

Bug fix first annotation
'setTimeout' is only needed at a creation of relations.
Refresh comments of a function 'relationCreateCommand'.
Tuning the delay parameter to select relation after a creation.
Replace a flag to dynmic functions in observeKeybordInput.
Fix format of comments of tool.js.
Refactor tool.js to split functions.
Refactoring tool.js with Underscore.js.
view.renderer.relation.arrangePosition is a private function.
A self-relation is not support.
Splict private functions in domUtil.selector.relation.
Replace setTimeout 0 to _.defer.