[issue-56] Added Two Environmental Variables to control simplification.
[issue-56] Added Two Environmental Variables to control simplification.

Added dontsimplifygeo env var to control enabling and disabling simplification.
Added simplifymaxzoom env var to control when the simplification will take effect.

terranodo/tegola,terranodo/tegola,terranodo/tegola,terranodo/tegola,terranodo/tegola