Started working on a state space trajectory analysis
Finished with the first pass at the state space trajectory analysis.
First commit on some work plotting example neurons.
New README file
Merging the example neurons notebook into master

ommit message to explain why this merge is necessary,
# especially if it merges an updated upstream into a topic branch.
#
# Lines starting with '#' will be ignored, and an empty message aborts
# the commit.
Added links to nbviewer of my notebooks.
Added two more notebooks to the README file
Worked on goal selectivity analysis
Added descriptions to the README file.
Merging goal selectivity branch into master.