Edited a typo
Merge pull request #56 from litera/patch-1

Edited a typo (hur => hue)
usage/editor-and-plugins.md: more links, minor formatting and clean-up, turned everything into links for more "clean" look.

gui-compilers-that-use-less.md: fixed some links.
Merge pull request #57 from seven-phases-max/master

Editors-and-plugins and GUI-compilers update.