Termgraph v0.2.0

• #38 Support Python >= 3.6
• #40 Fix stacked label alignment

Termgraph v0.1.4

• PR #31 - Fix to normalize method, division by zero error. Props to @ocozalp

• PR #32 - Fix vertical graphs, missing args. Props to @joaquincasares

• PR #32 - Do not output color character if not specified. Props to @joaquincasares