Provide better errors in getListHelper
Added hilight-line-on-hover for lists
Added safety checks to avoid duplicate JS
If parse_templatefile crashes then the file isn't valid
Removed duplicate status message on buildPackage error
Cleaned up installTemplateFile debug messages
Added support for multiple liveHeader calls

This lets callers call it once in <head> and once
at the end of <body>, allowing for scripts to be executed at the
end of the load, rather than at the beginning, speeding up load
times.
Added CDN-hosted lodash
Added caching for category_id
Merge branch 'master' into categoryLayouts