Allow configuration of graph layout direction.
More layout configuration options.
Implemented deleting of content in edit modals

Rendering of content preserves the original order instead of grouping into
text and link
Implemented deleting of concepts in edit modals

With different button colours a la #46
Merge pull request #50 from knowledge-map/edit-modals-delete

Merged #50.
Plugin for listening to clicks on concepts.
Merge pull request #53 from knowledge-map/click-event-plugin

Plugin for listening to clicks on concepts
Fixed an inconvenience in the click events plugin.
One more knowledge-graph.
Whole concept can be click not just text

Fixes #45
Added hover highlighting behaviour for concepts

Resolves #57
Merge branch 'master' into concept-clicking
Merge pull request #59 from knowledge-map/concept-clicking

Concept clicking
Updated distribution files
Merge pull request #60 from knowledge-map/master

Update gh-pages to mirror master