* fix Contrast for Nokia Display #1041
* attempt to fix#1016 by improving inverter status
* added option to adjust effiency for yield (day/total) #1028
- rework display type handling: remove uneeded checks because defined context from which functions are called
- default initialize "mMono" pointer (potential illegal memory access)
- define EXACTLY one display type for ePaper display (type 10). There is no need to use ranges and distinguish oled from epaper display. Simply one switch/case
- correct type handling for display type (javascript). Event handler gives a string instead of number (display type)
* further improved save settings
* removed `#` character from ePaper
* fixed saving pinout for `Nokia-Display`
* removed `Reset` Pin for monochrome displays
fix limit in [User_Manual.md](../User_Manual.md)
changed `contrast` to `luminance` in `setup.html`
try to fix SSD1306 display #759
only show necessary display pins depending on setting
improved saving settings of display #747, #746
disabled contrast for Nokia display #746
added Prometheus as compile option #719, #615
update MQTT lib to v1.4.1
limit decimal places to 2 in `live`
added `-DPIO_FRAMEWORK_ARDUINO_MMU_CACHE16_IRAM48` to esp8266 debug build #657
a `max-module-power` of `0` disables channel in live view `setup`
webserial minor overflow fix#660
web `index.html` improve version information #701
fix MQTT sets power limit to zero (0) #692
changed `reset at midnight` with timezone #697
reenabled FlashStringHelper because of lacking RAM
complete rewrite of monochrome display class, thx to @dAjaY85 -> displays are now configurable in setup