fix some bugs

* fix error on system.h multiple definitions
* add to MakeFile the CC65_PATH environment variable for setting the CC65 Folder

Merge pull request #13 from durangoretro/updatefromdclib

updating durangolib to last version

Merge pull request #3 from durangoretro/migratetodclib

adding docs to zip

adding examples folders and makefiles

adding 16k config

WIP: 0.0.2

* updating Makefile for use cl65 instead of cc65 and ca65.
* adding video.h with video functions
* adding initVideoFunction for init HIGH RES or color.

updating makefile