Added bower dependencies, doctype changed to html

Closure library and templates added as a bower dependencies. Template's doctype
changed from "5" to "html".
Added indexes to table model, changed style of pk

Changed view style for primary keys. Added setting of indexes at table
model.
Indexes changed to array, added relation highlighting and `setIndex` test

Changed simple one index per column to list of indexes. Added highlight
of relation on mouse over. Added test suite for `setIndex` method.