Prevent onPropertyChanged being triggered if both values are NaN

This is something we fixed in CT and are now feeding it back to BRJS.

THe bug was that if you had a property with a value of `NaN` and you
called `setValue` with `NaN` again it would still trigger
`onPropertyChanged` even though the value hasn't really changed.
fixing implementation of CSS tag plugin - fixes #698

- it now properly supprts theme and alertnateTheme
- it also allows both the theme and alternateTheme to be used at the
  same time
- theme and alternateTheme can be comma seperate values to define
  multiple themes in the same tag
adding test that verifies blade themes can be loaded if the aspect doesnt have that theme, and removing the aspect level theme in the dashboard now this is supported - fixes #694
improving stylesheet regex so non locale CSS files with an _ are supported - fixes #695
fixed a bug in the CSS resource plugin where it wouldnt handle resources requests properly
removing unused import
small tidy up of dependencies, also making spec test dependencies compile dependencies to fix ##522
replacing the default servlet with one that always returns a 404 to prevent files being loaded directly from disk
changing the build command to build to a temporary dir to better allow build apps multiple times to the same location
refactoring AppBuilder and BuildApp command
wrapping readers used in IOUtils.copy in an auto close try block
changing src file in lib template - fixes #707
adding files that were missed in a previous commit due to gitigonre rules
enabling a test that now passes and improving a JSP support test
removing dead code and improving locale regex
Merge pull request #688 from janhancic/develop-presenter-property-fix

Prevent onPropertyChanged being triggered if both values are NaN
adding failing test for JsCodeBlockStrippingReader
Merge branch 'develop' of github.com:BladeRunnerJS/brjs into develop
fixing namespacedjs content plugin causing syntax error in the globalisation block
adding i18n resources to templates