Added new keywords to String library: Convert To Lowercase and Convert To Uppercase
Modified based on the comments
Added note to AUTHORS.txt
Combined test suites, should hava done that in the first place
+ Fixed AUTHORS.txt to contain name only one time
+ Added empty line at the end of the test data
BuiltIn.Log pprint support

This resolves issue #1666, Use Python pprint module inside Log keywords.

I've modified Log to use pprint.pformat internally.
Fixed: Broken unittest in windows

In windows if there is a drive present L: the unittest was failing.
This issue is the case with all drive letters.
Merge pull request #1747 from guykisel/pprint_repr

BuiltIn.Log pprint support
Merge pull request #1744 from aaltat/master

Added new keywords to String library: Convert To Lowercase and Convert To Uppercase
Merge pull request #1752 from bartvanherck/fixWindowsUnittests

Fixed: Broken unittest in windows if it has L: drive

Apparently nobody had run unit tests on Windows with L: drive earlier.