Pure LaTeX version of manuscript including panorama multi-fig

Incorporates Juan's updated references
Based on the original pre-print
Uses pythontex for code typesetting (in TeX Live 2013/MacTeX)
Panorama multi-fig
Merge pull request #63 from JDWarner/latex_paper

Pure LaTeX version of manuscript including panorama multi-fig
LaTeX paper minor revisions.

Add support acknowledgement
Remove parens around one reference due to text flow
Add line numbers globally to assist reviewers
Correct Makefile to build all prior to latex specific script
Merge branch 'master' of https://github.com/scikit-image/scikit-image-paper into latex_paper
Pythontex is not widely available, so include it here
Fix typo
Minor wording change in industry section
Merge pull request #65 from stefanv/include_pythontex

Include pythontex
Minor update to industry section #2
Merge pull request #66 from NeilYager/master

Minor wording change in industry section
Manually resolve merge conflicts in Makefile and skimage.tex

Conflicts:
	Makefile
	latex/skimage.tex
Merge pull request #64 from JDWarner/latex_paper

LaTeX paper minor revisions
Fix various encoding errors in refs
Replace reference by URL footnote in intro
Replace references by URL footnotes in library
Update URL refs in development practices
Update data conversion references
Move API docs reference to footnote
Fix citations in education section

I've removed the conference links as I don't think they provided much
value...
Remove simple URL citations in industry section