This is what we use in DexterOS 2.0

bring develop to master for DexterOS 2.0 (#44)

* Add Line Follower drivers and example

* Update dexter_i2c.py

Update dexter_i2c.py to be simpler and more universal by combining
functions.

* Update line_follower.py

Update line_follower.py for recent dexter_i2c.py update

* Feature/easy libraries (#35)

* Move Distance Sensor and Line Follower in here

* remove dependency on mock_package

* remove alias for read_sensors until we know if we need it (probably not)

* Feature/system wide mutex+ easydi_sensors library  (#36)

* Move Distance Sensor and Line Follower in here

* remove dependency on mock_package

* remove alias for read_sensors until we know if we need it (probably not)

* get easydi_sensors from DexterOS

* Check for overall mutex need

* Add systemwide mutex comment

* Add license header and description

* Add license header

* change year in license header

* split easydi_sensors into 3 components for systematic naming convention

* Remove copies of ifMutexAcquire and ifMutexRelease. Keep them in one file

* Be more strict in what we're pulling in from easy_mutex

* poll overall_mutex each time

* remove print statement (#37)

reconfig_bus() is now mutex protected

* feature - update documentation for the latest (#41)

* feature - configuring the environment for RTD

* feature - bulk changes to docs

* feature - add comment on how to build documentation

* feature - add part of the documentation

* feature - completing the documentation for easy sensors + tutorials

* feature - work on the tutorials + other stuff

* feature - fix the mutexes tutorial

* feature - change organization of documentation

* feature - remove an unnecessary section

* feature - show the right command for installing di-sensors

* feature - small changes

* feature - fix documentation & and missing parts

* feature - fix naming of the package

* Revert commit

* minor fixes to docs (#42)

* minor fixes to docs

* minor fixes to doc

* fix grammar

* rename safe_heading to heading_name and re-instate the parameter (#43)

* rename safe_heading to heading_name and re-instate the parameter

* rename from heading_name to convert_heading

* add punctuation

* fix - change name of method in library description section

* Remove references to line follower (#45)