delete coil files
(cherry picked from commit 3251ccf57c96b49172f1b2a037f3f553e0c4ccf7)
remove vessel.txt
Merge remote branch 'aaron/master'
Implememnt inside_vessel and test it out.  Seems to agree with Canik's
inside_vessel program
add cartesian to poloidal comparison subroutine
add subroutine to compute both main and aux fields
Implement field line following, still have to test for accuracy
Fix errors, code follows equivalent to old fortran for main coils
include aux current, exact agreement with previous fortran code
Change test_follow_field to a subroutine to allow a top level follow to
wall function
Integrate field line follower and inside vessel checker.  Agrees
reasonably well with matlab calc
add readme
Add points loader and testing files
Make a real makefile
Have the makefile also handle our test files.
fix not using Options on makefile leading to segfault
Integrate point reader and follower, there's still a bizarre bug I can't
find
Fix bug where Nans were appearing occasionally and throwing stuff off
Generalize coil file loading
Refactor coil_module to remove derived type and make it dynamically
allocatable