prepared the XML manifest, updated language files.

PHP file has both plg_system_highlight and plg_google_analytics code.
changed language to languages
more tweaks
working proof
abstracting data collection
efficiency!!
code documentation
code documentation
perfectionism
3.0 compatibility
Jim's changes
perfectionism
consistency
added method to get fieldnames from XML
code documentation
time to commit.
nearly there
whoops
stopping here
tweaks