Moved Webmerge::Path::CSS importURI/exportURL to Webmerge::Path
Removed Webmerge::Path::web_path function
Removed exportURL and added exportURI
Replaces web_url with exportURI function
Removes obsolete code for path handling
Renames localpath to relpath
Normalizes URI/URL/Path usage in code
Removes obsolete path normalizations
Renames res_path to check_path and resolve_path to res_path
Changes some code comments
Fixes JS include handling