Fix inconsistent formatting of emails in the README.
Link to nightly builds at the top of the README.
Link to nightlies now more prominent.
Link to nightlies now h3 instead of h4.
Readme nightlies link now h2 instead of h3.
Try to put nightly builds link in the h3 tag.

Let's see how this works.
Merge branch 'f-nighlies-readme' into develop
Merge branch 'f-editorthing' into develop
Merge branch 'develop' of github.com:learnmath/lysa into develop

Conflicts:
	README.md
Merge branch 'develop' of github.com:learnmath/lysa into develop
Readme - remove wrong explanation of the FDL.

It was correct for the CC-SA license, but the FDL has more caveats, which need
more explaining. I'm not willing to do that right now, so I've instead switched
the "read the license" explanation. It's not actually that hard to read, I
recommend reading it.
Ch 1 - remove incorrect explanation of FDL.

The explanation is now "read the license".
Merge branch 'f-fdlfix' into develop
Merge branch 'develop' of github.com:learnmath/lysa into develop
Merge pull request #52 from pharpend/develop

Fix incorrect explanations of the FDL