Rename variables in IconPlugin.

* icon_type => base_class

* value => type
Refactor IconPlugin as setting default
Fix IconPlugin test

Fix test as setting default "glyphicon"
Add/Modify IconPlugin test ( unsolved )

* Add html character escape test

* Set original haik class name "haik-plugin-icon" to all
Resolve set original class name to all
Resolve html character escape when it into params