added a presence absence template match
 #324 fitSpline implemented
Cleaning up tests directory

This is my first step towards cleaning up the tests directory a little bit.
These three images aren't supposed to be here, and they shouldn't come back.
warn and return
Fixes test_optional and test_stereovision breaking

This fixes some tests that were breaking, and also removes a couple of typos.
I also took the liberty of changing some aesthetic stuff, which were non-pythonic.
Adds the /tests/standard folder to .gitignore
Removes test-generated images from repository.
Fixes typo
Moves StereoVision test stuff out of the test root
Fixes test missing stereovision stuff

This fixes one test which also used the StereoVision files. It should probably
be moved to test_stereovision, but whoever put it here must have had a good reason.
Fix typo in ImageClass.py

Replaced "fixex" by "fixed" in example of rotate().
Merge pull request #401 from mfkaptan/patch-1

Fix typo in ImageClass.py. Thanks for keep an eye out for us.
Merge pull request #400 from salil93/ls_error

Minor bug fix in getLineScan/setLinescan. Thanks for your contribution.
Merge pull request #399 from victsou/develop

Cleaning up tests directory. Awesome. Thanks.
Merge pull request #397 from akshaydixi/LineScan/fitSpline

 #324 LineScan.fitSpline implemented. I am going to merge this in but be aware that there is no test, I am going to accept it because there is example code with output. We need to break out the line scan tests into a separate test suite. Once we get that up and running we will need a test for this.
standard got broken again, please don't remove these.