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