Implemented full code injector api.
Fixed code structure and documentation.
Added function to inject code with task id only.
Fixed api methods.
Added tests to js_injector class.
Added client handler, unfortunately tests are not! working.
Remade injectCode method. Now it has a default parameter.
Minor test fixes.
Modified js_injector for it to be able to communicate properly with comm_manager.
Modified inject and unload methods, removed onCodeLoaded method(it has been replaced by specified callbacks).
Fixed part of tests.
fix failing spec
Finished tests, everything now passes.
Merged with development.
Delete js_injector.coffee.orig
Merge pull request #67 from TheTaz/js_injector

#50 Pełna implementacja API JS Injector [3]