Makes initial backlight state configurable.
Adds simple Lcd1602/2004 classes.
Tidying.

Tested with 16x2 and 20x4 displays with 4 and 8 bit addressing.
Tested with MCP23008 I2C interface (on CrowPi).
All device input working and tested, including custom characters.
Performance tuned for 8 bit direct access (now 3X as fast).
APIs massaged to align with existing .NET terminology (Console, etc.).
Detailed comments added on behavior and performance considerations.

Will follow up with assembly name changes. Also will add a simple LCD1602 and LCD2004 derived class for the most common cases.

* Fix input pin bug and added summaries

* Updated access modifier

* Updated exception message

* Add bit validation back

* Removed validation for GetBit

* Update samples to use preview 2 packages

* Renaming files to PascalCase

* ddressing feedback

* Adding link to myget feed

Mark that preview packages have been published to nuget.org

Add install instructions for IoT.Device.Bindings

* Adding Iot.Device.Bindings package

* Adding missing tag

* Initial commit

* Remove tests add GetDistance

* Add sample

* Update sample

* Ref perform both operations at once

* Fix some review

* Update code to resemble krwq

* Clean up the readmes

* Add fritzing diagram

* Add 1kohm resistor

* Fix class docs

* Adding DHTxx support, software PWM and Servomotor

* Fixing feedbacks from last PR

* Correcting code and documentation based on PR feedbacks

* Added a simple implementation for a MAX7219 device

* Add MatrixTextWriter and optimise Max7219 device

* Fixes issues from pull request comments

* Changes for pull request

* More changes for pull request

* refactoring: rename MatrixTextWriter to MatrixGraphics

* Font implementation optimised

* Added editconfig file

* Beginning of cleaning

* Added summaries and sorted

* Added callback summaries

* Fixed ordering and switch/case based on feedback

* Added editconfig file

* Added new GPIO commands

* Updated doc

* Updated based on feedback

* Simplify naming

* Added pin options, abstract class and I2C

* Updated wording

* Removed code markdown for product

* Add notes and new device classes

* Updated README and constructor summary

* Changed class to static

* Added bit methods

* Added WriteBits sample

* Added editconfig file

* Initial clean scan

* Moved library

* Yet another rename to make consistent

* Removed semicolon

* Renamed to Libraries file

Ignore DS_Store for working with Mac

* Added editconfig file

* Added design reviews

* Added editconfig file

* Cleanup for SPI drivers

* Updated for feedback

* updates per previous feedback. Add readme and fritzing diagram.

* address feedback for camelCase variables and excplicit access modifiers

* remove space character that broke link to Si7021 readme

* Added editconfig file

* Cleanup for I2C drivers

* Cleanup for I2C drivers

* Updated wording

* Updated for feedback

* add sample for si7021 temperature read over i2c

* add Si7021 device class

* remove ReadTempFromSi7021.cs

* add device sample for Si7021 and humidity read command

* remove reference to README in Si7021 csproj file

Added UART pins as GPIO pins for Board/Logical conversion

* Basic cleanup in GPIO files

* Basic comment cleanup in GPIO files

* Removed othing lingering words

* Another round of GPIO cleaning

* Removed a couple more words

* Added readonly and updated casing

* Better method grouping and synced constructor summaries

* Added How to Prepare a Publish Profile doc

* Updated title

* Heck consistent wording

* Added for win-arm

* Updated  CLI section and file transfer tools

* Removed irrelevant section

* Replaced spaces with dashes

* Forgot link

* Added device binding template readme

* Folder name was clipped

* Heck wording

* implement fallback enumeration for hummingboard - where PWM friendly names are not currently set