LineContents class
Lines now expose contents
TerminalRenderer class
Rendering Tabs via TerminalRenderer
Merge branch 'remove_render_logic_from_tablature' into issue-1-play-with-curses
MainWindow class
CursesColors class
CursesRenderer class
--curses argument

We can render in curses now.
Basic chord navigation with b,n
Exit with q
Merge branch 'parse_curse_mode' into issue-1-play-with-curses
PEP8 compliance
Added ukelele instrument. Bar bugfix
PEP8 compliance
Merge branch 'general_cleanup' into issue-1-play-with-curses
Merge branch 'issue-1-play-with-curses'

Closes #1