Fixed an issue where empty constraints on a non-observable field caused trouble.

This fixes #38
Fixed the error message for modules which cannot be loaded. Each message should be on a separate line

This fixes #39
Made sure the extracted scripts contain javascript. All other script tags are left alone.

This fixes #40
Merge branch '38_EmptyConstraints'
Merge branch '39_ModuleErrorMessage'
Merge branch '40_ScriptType'
Release 0.2.13