The monokai-tc colorscheme has been renamed to plain monokai and has
been made the default colorscheme. It is still a true color colorscheme,
but the automatic 256 color approximation is very good so it can be used
just fine in terminals which do not support true color.
If your terminal only supports 16 colors, used the 'default'
colorscheme.
These mappings include Alt+arrows and Shift+arrows and Alt+Shift+arrows
This commit also switches the version of tcell that micro uses to my
fork which supports alt, shift, and ctrl + arrows.
