Replace termcolor

[ClasherKasten]

In the process of adding the new CLI, @GauthamBellamkonda noticed that termcolor has a very limited color set which doesn't provide as much flexibility as we want to provide. To fix this, we need to find another library which provides the following abilities:

• colores the output (foreground and background)
• accepts hex colors as input
• (eventually shoud have a core set of named colors (E.g. "white", "black", "blue", ...))

[GauthamBellamkonda]

@ClasherKasten, how about colored? I am willing to take up this issue as well.

[ClasherKasten]

LGTM