Major UI Update - release

- Bug fixes 
- Jack doesn't show as plugged in if no jack detection is configured 
- New layout
- Updated jQuery to latest version
- Updated bootstrap to latest version
- Updated the command processing backend to support UI interactions
- Added a number of accessors to normalize read/update various configuration entries 
- Added more GPIOs to the status tab GPIO list
- Added several configuration sections for hardware and system
- Removed pop-over windows from system messages
- Added a message count pill to the status tab
- Added support for message count pill based on the highest severity 
- Updated the message list table to set colours based on messages severity
- Added command processing message area close to the action buttons to provide feedback from running the commands


** See pervious commit for changed files**

README.md

@@ -250,15 +250,7 @@ The above command will mount this repo into the docker container and start a bas
 for you to then follow the below build steps
 
 ### Manual Install of ESP-IDF
-<<<<<<< HEAD
 Follow the instructions from https://docs.espressif.com/projects/esp-idf/en/v4.0/get-started/index.html to install the esp-idf v4.0. This is the currently supported release of the espressif software development system. 
-=======
-<strong>Currently the master branch of this project requires this [IDF](https://github.com/espressif/esp-idf/tree/28f1cdf5ed7149d146ad5019c265c8bc3bfa2ac9) with gcc 5.2 (toolschain dated 20181001)
-If you want to use a more recent version of gcc and IDF (4.0 stable), move to cmake-master branch</strong>
-
-You can install IDF manually on Linux or Windows (using the Subsystem for Linux) following the instructions at: https://www.instructables.com/id/ESP32-Development-on-Windows-Subsystem-for-Linux/
-You also need to use esp-dsp recent version or at least make sure you have this patch https://github.com/espressif/esp-dsp/pull/12/commits/8b082c1071497d49346ee6ed55351470c1cb4264
->>>>>>> refs/remotes/origin/master
 
 ## Building Squeezelite-esp32
 MOST IMPORTANT: create the right default config file