change sections order
added new example using Arduino Serial Monitor to turn ON/OFF a led
re-writting names
re-writting title
Merge pull request #48 from franramirez688/release/0.12

Arduino Serial Monitor - LED example
written change log
typo
12 != 21 (dislexiaaaa)
Merge pull request #49 from biicode/release/0.12-changelog

written change log
Update changelog.rst

Removed wrong feature
simple text change
Merge branch 'release/0.12' of https://github.com/biicode/docs into release/0.12
arduino serial monitor example changes
release 0.12
Merge remote-tracking branch 'biicode_docs/master'
ino project best practice