Changelog

Added #{battery_charging_watts} format string for displaying current watts supplied on macOS
Added #{battery_color_bg}, #{battery_color_fg} format strings for dynamic color based on charge/status
Added #{battery_color_charge_bg}, #{battery_color_charge_fg} for colors based solely on charge level
Added #{battery_color_status_bg}, #{battery_color_status_fg} for colors based solely on battery status
Added #{battery_icon_charge}, #{battery_icon_status} for granular icon control
Added 8-tier charge level icons and colors with full customization support
Added #{battery_graph} to display battery as a bar graph
Added @batt_remain_short option to shorten remaining time display
Added WSL (Windows Subsystem for Linux) support
Added OpenBSD apm support
Added battery_enabled.tmux script for conditionally showing battery
Fixed battery graph display
Removed deprecated #{battery_status_bg} and #{battery_status_fg} format strings
Changed preferred order of utility applications to: pmset → acpi → upower → termux-battery-status due to CPU usage issues with upower

show output for #{battery_remain} interpolation only if the battery is discharging
prevent displaying "(No" for #{battery_remain} interpolation (when battery status is "No estimate"
display all batteries that upower knows about (@JanAhrens)
acpi battery status (@cpb)
fix issue with status-right and status-left whitespace being cut out
fix issue with the pmset -g batt command output for macOS Sierra and further

switch to tab indentation
do not automatically prepend battery status
change format interpolation strings to more Tmux-idiomatic #{battery_percentage} and #{battery_icon}
refactoring for simplicity
support interpolation in status-left option too
README update

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