Delete irrelevant examples

To organize and clean repository
Change structure of Pin handling

Add separate pin handling structure for GPIO, PWM and Analog Pins.
Remove unnecessary declaration (Useful for Beaglebone, but not for CFA10036)
Change in wiring_analog and wiring_digital pin handler, read and write functions.
PS: Also thank Meanboat. He was too lazy to make these changes on his laptop!
Add debug interface to sysfs and SPI

'make CFG=debug' can be used to debug low level functions (sysfs) as well as SPI.
Remove CapacitiveSensor library

CapacitiveSensor library is not supported by Userspace-Arduino as of now.