relocated tair module into Bio.Webtools.TAIR
moved scripts to reflect new module structure
changed module name in setup.py
changed TAIR import in get_agi_seq.py
renamed tair tests to reflect module structure
fixed import TAIR in test_Webtools_TAIR.py
fixed imports in TAIR module
added MultipartPostHandler to webtools module
fixed TAIR module to use MultipartPostHandler from within the Webtools module