Include lcd.h to initialize LCD
Add define to please MPLAB X

You have to define __PICCPRO__ in your project in order for the MPLAB X parser
to not underline __delay* functions.
putch's parameter is constant.
Changed all post-increments to pre-increment.

Pre-increments are more efficient in loops (and in general, too).
Implementing basic state system

Just a basic state machine, switches from getting a value and displaying "Menu".