[MINOR] Doc Typos
[MINOR] Doc Typos

Fixed a some typos in the REST API Documentation

Author: Alex Bozarth <ajbozart@us.ibm.com>

Closes #59 from ajbozarth/patch-1.

ajbozarth/incubator-livy,meisam/incubator-livy,ajbozarth/incubator-livy,ajbozarth/incubator-livy,ajbozarth/incubator-livy,meisam/incubator-livy,ajbozarth/incubator-livy,meisam/incubator-livy,meisam/incubator-livy,meisam/incubator-livy,ajbozarth/incubator-livy,meisam/incubator-livy