Updated README.md
Merge pull request #22 from crwper/update_readme

Updated README.md
NEO-7N should be a link
Updated README.md again
Merge pull request #23 from willglynn/fix_neo7_link

NEO-7N should be a link
Updated README.md again
Merge pull request #24 from crwper/update_readme

Update readme
Ignore UNIXy build outputs
Merge pull request #25 from willglynn/extra_ignores

Ignore UNIXy build outputs