Doc changes (#132)

* fixed web ui joystick for iphone 5s, 6, ipad 2

* turned off print

* adding startup script for my car

* fix batch size

* added physical joystick controller

* added mock camera and mock controller to test some car code on my laptop

* added requirements.txt

* some changes to fix windows setup

* add environment file to init conda environment

* some windows howto docs, pi anaconda env file and setup script

* fix arm platform detection

* changes to get init config files

* fixes

* more tweaks

* wip on training script

* readme changes

* readme edits

* remove large file

* fix for web ui on iphone

* added sessions to make_paths

* conda env tweaks

* modified car script to add training

* experiments with throttling records base on err... throttle

* merge fixes

* optional argument to specify joystick device file

* car driving w joystick input now. training too.

* renamed dev to dev_fn to help indicate filename type

* use throttle magnitude to restrict recording

* fixes to package template files

* few fixes to joystick controller

* added raspberry pi sixpair

* added build script for sixpair

* fix windows specific path parsing error. should be cross platform now.

* fix for mode switching to local and local_angle

* handle json errors without crashing. delay import of unix dep python module.

* added template for manage w joystick. fixed some json problems w output.

* add windows how-to. needs some editing thoough.

* added donkey_env.yml for conda env setup

* added patch howto

* tweaks

* tweaks

* added windows conda env yml

* tweaks

* tweaks

* remove car.py

* added script to concatenate two tub records

* addedsome arguments to tweak in joystick template

* tweak to correct for right steering tend in default donkey

* fix training

* disabled early stopping

* ml fixes to silence warnings, use new api for fit generator

* added comments

* various faq fixes

* removed uneeded packages from rpi.yml

* fix double reference to x input in joystick

* more detail in faq

* install tweaks to windows setup

* fixed repo reference in windows setup

* simplified joystick bluetooth setup. works with default joystick code.

* more detail.

* re-pariing after charging.

* more detail on joystick and web controller

* yes, something else.

* cleaned out files

* test for image stack of last 3

* added Tub derived class to try training against stack of 3 images

* fix formatting in install. add section for controls w joystick. removed part that would pull in cv2 for everyone.

* added TubImageStacker

* cleaned root

* added mac.yml anaconda setup file

* improve docs for windows and mac install. add detail for network setup.