First commit of dev branch.
Added lib files to dev
Ran IDLDOC, stored results in doc/ subdirectory.
Added LICENSE.txt file with GPLv3 license.
Renamed as IFSFIT.
Renamed one routine (common/ifsf_addpoly2temp.pro) to correspond to new package name, and included the new copyright and license statement.
Removed lib/ subroutines (see README_revisions.txt for some other minor details).