cross site iframe compatible version of core  module

Other modules still don't work with similar technique
Correctly name the client bundle
Convert gwtl-label to use ClientResource mechanisms of GWT
Rename client bundle to ensure that it matches the package name
Convert Proj4 module to use client bundles
Patch the base Leaflet resource to ensure that the layers image is correctly injected.
Rework the search module to be loaded as GWT client bundles
Add quotes around url in injected css
cross site iframe compatible version of core  module

Other modules still don't work with similar technique
Correctly name the client bundle
Convert gwtl-label to use ClientResource mechanisms of GWT
Rename client bundle to ensure that it matches the package name
Convert Proj4 module to use client bundles
Patch the base Leaflet resource to ensure that the layers image is correctly injected.
Rework the search module to be loaded as GWT client bundles
Add quotes around url in injected css
Rename file in preparation for correcting case
Name file with the correct case
Merge branch 'convert_to_client_resources'