Added t2data convert_to_AUTOUGH2() method; formatting cleanup in convert_to_TOUGH2()
Refactored convert_to_TOUGH2() method and added ability to convert SHORT output to FOFT/ COFT/ GOFT; finished convert_to_AUTOUGH2(); added ability to set t2data type property
Minor modification to handling of MOP(21) in convert_to_AUTOUGH2()
Documentation update to cover t2data convert_to_AUTOUGH2(), and ability to set t2data type property
Bugfix in convert_to_AUTOUGH2() and convert_to_TOUGH2()- internal sections list wasn't being updated to reflect added/deleted sections