update docs to make readthedocs happy

--HG--
rename : doc/Makefile => docs/Makefile
rename : doc/advanced_usage.rst => docs/advanced_usage.rst
rename : doc/basic_usage.rst => docs/basic_usage.rst
rename : doc/conf.py => docs/conf.py
rename : doc/how_to.rst => docs/how_to.rst
rename : doc/index.rst => docs/index.rst
rename : doc/installation.rst => docs/installation.rst
rename : doc/introduction.rst => docs/introduction.rst
rename : doc/make.bat => docs/make.bat
rename : doc/pylibftdi.examples.rst => docs/pylibftdi.examples.rst
rename : doc/pylibftdi.rst => docs/pylibftdi.rst
rename : doc/quickstart.rst => docs/quickstart.rst
rename : doc/troubleshooting.rst => docs/troubleshooting.rst