Merge pull request #19 from pivotal/PR-fix-start-panic

Allow Start to be called immediately after Stop

add support for get terminal size for windows (#22)

* add support for get terminal size for windows
* return 0, 0 terminal size instead of calling os.Exit
* use the termbox library to fetch terminal size [fix] #24 because it is platform agnostic -> works on windows too
* include missing windows imports [fix] #24
* Travis-CI: add OSX and linux->win cross-compilation [fix]
* Use latest two supported versions of Go instead of tip. Disable CGO.

add Makefile

Fix "infinite scrolling" issue. (#10)

Move up a line with ansi control code instead of down a line with '\r'.