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
Minor wording change in industry section
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
Update awkward Enblend citation
Modify readme for new build instructions
Merge pull request #68 from jni/fix-references

Fix references