* Update .travis.yml and use stages
This updates the .travis.yml configuration to use separate stages for
unittests and CLI tests. The output is now clearer, since for unittests
and CLI tests separate web pages are available.
* Use go modules and simplify build
* Add ppc64le support to Makefile
* Update crypt libs to fix tty ioctls on ppc64le
The hardcoded tty ioctl commands in the terminal package were not
correct for ppc64le and caused the ioctls to return ENOTTY for
commands like TCGETS and so on. The bug is fixed in later versions.
