Add logger and more javadocs to FXMLView

Hi Adam,
I just started using afterburner.fx. It is awesome. I am very familiar with Java EE 6 and the possibility to use the same injection in an Java FX application rocks.

I enhanced the documentation for the FXMLView and added a logger to see if some non available resources or css files are silently ignored.
I ran the tests and they are still completely working:


-------------------------------------------------------
 T E S T S
-------------------------------------------------------
objc[3926]: Class JavaLaunchHelper is implemented in both /Library/Java/JavaVirtualMachines/jdk1.8.0.jdk/Contents/Home/jre/bin/java and /Library/Java/JavaVirtualMachines/jdk1.8.0.jdk/Contents/Home/jre/lib/libinstrument.dylib. One of the two will be used. Which one is undefined.
Running com.airhacks.afterburner.injection.InjectionProviderTest
Tests run: 9, Failures: 0, Errors: 0, Skipped: 0, Time elapsed: 0.22 sec
Running com.airhacks.afterburner.injection.MockingTest
Host: tower
don't worry, just a mock
Tests run: 1, Failures: 0, Errors: 0, Skipped: 0, Time elapsed: 0.726 sec
Running com.airhacks.afterburner.lifecycle.ModelLifecycleTest
Mär 30, 2014 12:36:08 PM com.airhacks.afterburner.views.FXMLView getResourceBundle
INFO: Was not able to find resource bundle: com.airhacks.afterburner.lifecycle.lifecycle
Mär 30, 2014 12:36:08 PM com.airhacks.afterburner.views.FXMLView getResourceBundle
INFO: Was not able to find resource bundle: com.airhacks.afterburner.lifecycle.lifecycle
Tests run: 2, Failures: 0, Errors: 0, Skipped: 0, Time elapsed: 0.057 sec
Running com.airhacks.afterburner.views.FXMLViewTest
Mär 30, 2014 12:36:08 PM com.airhacks.afterburner.views.FXMLView getResourceBundle
INFO: Was not able to find resource bundle: non-existing
Tests run: 1, Failures: 0, Errors: 0, Skipped: 0, Time elapsed: 0.01 sec
Running com.airhacks.afterburner.views.TopgunViewTest
Host: tower
Host: tower
Host: tower
Host: tower
Host: ivory tower
Host: tower
Host: tower
Host: tower
Tests run: 7, Failures: 0, Errors: 0, Skipped: 0, Time elapsed: 0.066 sec

Results :

Tests run: 20, Failures: 0, Errors: 0, Skipped: 0

[INFO] ------------------------------------------------------------------------
[INFO] BUILD SUCCESS
[INFO] ------------------------------------------------------------------------