jquery-ui custom images cleanup
jquery-ui cleanup:
 - adding README file and few others from the original package
 - removing themes/flicker
panojs css cleanup
webgateway css cleanup
webclient dusty.css and dusty_ie.css cleanup
moving wrapping JQuerySpinBtn by top level container
fixing embedding dragdiv.mousewheel in viewer
keeping jquery-ui imports of css and js in one location
changing jquery-ui path in webgateway
changing jquery-ui path in viewer
removing jquery-ui-1.8.19.custom.min.js in favor to

3rdparty/jquery-ui-1.8.19/ui/jquery-ui.js
introducing js and css compression using django-pipeline, see #11519

This is first step to make embedding the viewer on static HTML page
examples of how to embed the viewer and minified files
removing GZpiMiddleware as that is used for HTML compression only
Merge remote-tracking branch 'origin/develop' into minify_media_viewer_only
Add slf4j dependencies to OMERO.matlab toolbox
Add getOmeroJars() function to list toolbox JAR dependencies

Include a conditional inclusion of the slf4j-api and slf4j-log4j12 JAR files
for versions of MATLAB older than R2011b.
Fix javarmpath() command in unloadOmero()

For some reasons, javaaddpath() supports a cell array while javarmpath()
does not. This commit unifies the behavior by passing the jars as multiple
elements to both functions in loadOmero() and unloadOmero().
Apend omero_client to the list of JARs to load
Use cellfun to add/remove JARs to the dynamic Java class path

For some unknown reason, javaaddpath(omeroJars{:}) does not work on the CI
node (effectively adding the first JAR only). This commit should fix the behavior by encapsulating the javarmpath/javaddpath calls using cellfun().