Consolidate GlobalIntVariable to NCurses

Signed-off-by: Jussi Virtanen <jussi.virtanen@valotrading.com>
Remove multiple references to library name

Signed-off-by: Jussi Virtanen <jussi.virtanen@valotrading.com>
Clean up COLOR_PAIRS implementation

Signed-off-by: Jussi Virtanen <jussi.virtanen@valotrading.com>
Merge pull request #15 from jvirtanen/cleanups/color-pairs

Clean up COLOR_PAIRS implementation