Add screenshot to front page

Also:
- Updated pythong_scripting.py example to show how to colorize text
- Updated contributing.md to show how to run code coverage in parallel using python-xdist and -nauto
- Updated contributing.md to talk more about looking at unit test results within the PR

1 files changed, 1 insertions, 1 deletions

diff --git a/examples/python_scripting.py b/examples/python_scripting.py
index a0d36e36..ae04fda1 100755
--- a/examples/python_scripting.py
+++ b/examples/python_scripting.py
@@ -36,7 +36,7 @@ class CmdLineApp(Cmd):
     def _set_prompt(self):
         """Set prompt so it displays the current working directory."""
         self.cwd = os.getcwd()
-        self.prompt = '{!r} $ '.format(self.cwd)
+        self.prompt = self.colorize('{!r} $ '.format(self.cwd), 'cyan')
 
     def postcmd(self, stop, line):
         """Hook method executed just after a command dispatch is finished.