add Catphan 500 and rotate CTP515 in Catphan 600

[kkkkwan]

Added Catphan 500
Added CTP401, use 50mm spacing air/teflon pins to determine rotation, because there is only one air insert in 401.
(also suggest to do this way on CTP404, because one of the air inserts may be filled with water)

use a rotated CTP515 in Catphan 500 and 600

[coveralls]

Coverage decreased (-1.4%) to 82.487% when pulling 7ba87ed on kkkkwan:CatPhan500 into 14a5296 on jrkerns:master.

[jrkerns]

Hi kkkkwan, thanks for the work. Do you have a catphan500 dataset you could attach here so that it can be tested? Thanks!