Issue #130

Add Jasny JS/CSS resources and demo for FileUploadField
OpenWebIcons is a CSS reference.
Merge branch 'master' into jasny-support
Issue #130 - Add support for Jasny's InputMask
Issue #130  Use AbstractConfig for InputMaskBehavior
Check for non-null argument
Add TODOs for using consistent name for #getModificationTime()
Interface field members are static final implicitly
Merge branch 'jasny-support'
improve less resource handling
change exception type and minor improvements to samples ui
change debug log messages and update to less4j 0.0.9
Issue #131 Minor improvement of javadoc
Issue #131 AbstractCompiledResource should not cache InputStream because once consumed it will return an empty result from there on.

LessResourceStreamLocator cache fields should not be 'static' because this may lead to problems when wicket-bootstrap.jar is put in shared lib folder of the web container.
IResourceStreamLocator is a singleton in an Wicket application so there are still just one instance of those fields.
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Merge pull request #131 from l0rdn1kk0n/less

improve less resource handling
[maven-release-plugin] prepare release bootstrap-parent-0.7.6
[maven-release-plugin] prepare for next development iteration
Update README.md
add static resource rewrite mapper