Removed RTC

Removed the RTC (real time clock) files as we are using the time
library in it's place.
Changed the LEDS file to be more generic

Changed the led driver to be more generic, this can now drive any pins
(up to 16 leds)
If needed you can define the Class again with more leds if you so
choose..
Added extra to the readme

Added some instructions to the readme file.
changed values to be private class vars

changed values to be private class vars
Changed a few defines in the config file

moved a few vars around to make them consistent
Allowed Ethernet to log a event

Added code so we can open the door and log the card scan at the same
time, otherwise the door will have to close before we gain focus again.
Optimisation

Due to the added code in the ethernet library I have had to shave as
many bytes as I could afford.
Thus added global variables, saving on serial printing etc.. has
enabled me to squeeze under the limit, should do more of this soon..