Added two supplements: Adding Audio and Hidden Buildings
Moved all Supplements to a Suppliments folder
Altered the three enablable archery buildings to conform to my Early Era Archery Buildings mod
Added audio tables to the world wonder template

Cleaned up multiple typos and clumsy statements in the Changes_2_Firaxis.xml and noted where I had given some dreadful advice
Added some further info to the BUILDINGS_GUIDE.xml on added new text_key references to world wonders supplied by Firaxis.

added info to the Buildings Guide for theming bonuses and made a few other edits to the document
add a file Changes_2_FIRAXIS.xml that covers update commands for changing the pre-existing buildings supplied by firaxis
edited the national wonder template to remove great works references and to remove references to theming bonuses
edited the world wonder template to add theming bonus examples
added a file called Text_Buildings.xml that contains all the firaxis supplied text strings for building or wonder text tags used in-game

added two new files to the "Lists" folder and madde minor edits to the Guide document