Added support for pic16f716

[urbim]

Added support for PIC16F716.

Changes are based on Microchip Programming Specifications.

The changes:

• Added chip constants
• Changed dataEnd calculation, so it returns the same address as dataStart, if dataSize is zero.
• Added custom erase procedure. (Similar to FLASH4, except without data erase)
• Changed code for starting programming cycle. Since pic16f716 requires 5V to be applied before 13V, the script now does that, if it detects pic16f716.
• Added custom programming procedure. (Similar to FLASH5, but with different commands)

I tested the script with two devices and it works flawlessly.

Urban Malc