Remove script usage examples

The examples have been removed from the respository.

This pull request should take care of the first item in #129
Change links to emperor.colorado.edu/master/...

These examples are built from the master branch every five minutes in
emperor.colorado.edu.
Merge pull request #135 from ElDeveloper/no_examples

Remove script usage examples
Changing default color scheme to discrete
Adding tests. Fix #136
Merge pull request #137 from antgonza/issue_136

Changing default color scheme to discrete