Thematic 1.1 alpha set theme options for legacy xhtml mode

Changing to alpha in versioning. Deprecated thematic_head_profile.
Introduced thematic_head . Changed tabbing structure to tidy html
output. Fixed some copy/paste typos. Removed invalid ref="generator"
from shortcodes.php. Added theme option for leagacy xhtml switch.
Backwards copatibilty checks anre not complete as of yet. Rearranged
deprecation from last commit to reside in deprecated.php