Make limiting of the reflow liquids queue size optional

If liquid_queue_purge_time == 0 then disable the queue size limiting and make this the default setting
Additionally, liquid_loop_max now defaults to 100000
Silence misc. warnings
Update MinGW toolchain downloads used by travis
Conf.example: Fix typo
State biome API heat and humidity noise parameters in positional format

Signed-off-by: Craig Robbins <kde.psych@gmail.com>
Increase indentation throughout file for clarity. Correct mistakes. Shorten lines. Make more consistent

Signed-off-by: Craig Robbins <kde.psych@gmail.com>