Cleaned up file structure

Removed sous_vide_functions (obsolete), merged with sous_vide.ino.
Updated sous_vide.ino with correct pins, etc based on standalone pinout.
Revert "Cleaned up file structure"

This reverts commit 07a869397ab1a59f13fc2b06be276cbf9688a9e0.
Merge branch 'master' of https://github.com/scottgoering/sous_vide