edit link added
added file type to filter 'wp_template_viewer_file_content'
Removed white space
Added the  line numbers strings for localisation with wp_localize_script
new functions is_themes_dir() and is_plugins_dir()
use of new functions is_themes_dir() and is_plugins_dir()
new function get_file_edit_link()
renamed toolbar node
Updated changed selector #wp_tv_file_list to .wp_tv_files
new class wp_tv_files
updated css for line numbers
Added function for line numbers: browser_supports_animation()
New click event listener for the line numbers link