use internal location where possible
fix thumbnail and links
Now in the categories list in layers and maps page the category with is_choice set to false are not displayed.
Added the MODIFY_TOPICCATEGORY to allow topic categories metadata customization when strictly necessary.
Merge pull request #1239 from capooti/metadata-custom-categories

Metadata enhancement for topic categories
fixes to reflect 1 to 1 the  readme.rst  installation method
Merge remote-tracking branch 'upstream_geonode/master' into master_geonode
add image to translation doc
add other options to translation docs
Added the block.super variable to templates that use the extra_head block to fix #1241.
Fixes javascript and styling problems in the replace layer view.
Fixes #1242.
Merge pull request #1243 from garnertb/master

Fixes #1242.
Added the documentation for the MODIFY_TOPICCATEGORY setting, and reorganized some of the settings in a "Metadata Settings" section.
add instructions on geonode project
modified setup
old setup
added toctree
modify translation docs
added translation