Added quickplot colour attribute to readme.

Author: stevemccoll

README.rst

@@ -21,7 +21,7 @@
    gn_log = gn_log.ignore("\.py$",ignoreif = "no match")
 
    gn_net = gn_log.network("author/file")
-   gn_net.quickplot("plot.pdf", layout = "spring")
+   gn_net.quickplot("plot.pdf", layout = "spring", colours = "simple")
 
 This snippet imports ``gitnet``, creates a ``CommitLog`` from our local repository, uses a regular expression to ignore files with names that do not end with ``.py``, creates a ``MultiGraphPlus`` object using presets for a bipartite author/file network, and saves a basic visualization of the network. (By default, author nodes are coloured white and python files are coloured light red.) The result looks like this:
 
@@ -163,4 +163,3 @@ We appreciate any comments from developers and researchers who stumble upon our
 - Include remote log extraction. One of the biggest caveats of gitnet is that you have to spend a significant amount of time downloading large projects.
 - Include additional export options for users of additional visualization packages, and who want to export dynamic network data.
 - Include additional custom classes for more VCS types and mailing lists.
-- Better quickplot visualizations, with default colours and optional labels.