MNT: Removed outdated project_to_sphere function

- The functionality of project_to_sphere is covered by
  processs_to_q
TST : fix travis to actually use current head
TST : give up on using conda recipe for now

 - travis makes a shallow clone of the target repo
 - conda-build tries to make a clone of the shallow clone which fails
TST: Testing of reference image subtraction implemented

MNT: Missed some renames in the refactor

MNT: Added whitespace in conda yaml file
MNT: Added test for nx=None in refine_center test for 100% coverage

MNT: Added coverage output folder to .gitignore
ENH: Moar test coverage

MNT: Docstring and new class attribute on XrayLibWrap

MNT: dict -> verbosedict, added class attribute to XrayLibWrap's

MNT: Moar test coverage
MNT: Overhaul of 2D -> 1D and added tests for it

- renamed function
- added test coverage for it
- fixed some PEP8 violations
ENH: 100% test coverage, woo!

MNT: 100% coverage on 2D->1D image conversion

MNT: Forcing coveralls to ignore tests/ and testing/ folders

MNT: Removed the casts to arrays

MMT: Removed rr from the input parameter names
MNT: list -> deque for faster appends

MNT: kwargs updated to match api change
MNT: Documented API change

DOC: Finished documentation to API change on img_subtraction

MNT: Another attempt to remove tests from coverage report

MNT: Another attempt to get coveralls to ignore the test/ and testing/ folders

MNT: Removed .coverage and moved .coveragerc to .coverage

MNT: Another test for coveralls to ignore tests/ and testing/

MNT: Another test to ignore tests/ and testing/