Added "load" icon, loadModel dialog transformed to React, fixed other dialogs

Added icon for "load model" tool. Dialog for loading model transformed to
ReactJS. Fixed dialog for SQL generating and saving of model.
Changed relation model, disabled text select over canvas

Relation model changed so that it contains only id of parent and child
table, not whole object. Text select over canvas (tables) was disabled.
Small code refactoring, added names of related tables to RelationDialog
Removed last piece of soy templates (Table), fixed handling Table move

Table converted to React, but React is used only as a static markup
language, not at all its power. Fixed error at recounting related relations
positions when Table moved.
Fixed defitions of `postgres` and `sql` to be true
Generator dialog translated to React, fixed base Dialog

Fixed case when Dialog confirmed but has no `onConfirm` dialog. Create
ReactJS generator dialog instead of `goog.ui.Dialog`.
Fixed canceling of tool by click to same tool again
Fixed `/` route, added definitions for Postgres 7.1 - 9.3