Update THANKS.md
Update Worm Tracking Sources and Tools.md
Update THANKS.md
Merge pull request #78 from JimHokanson/master

Cleaned up example code
Update THANKS.md
Update THANKS.md
Update THANKS.md
Delete Code Progress.xlsx

This file has been moved to the [movement_validation Google Docs folder](https://docs.google.com/spreadsheets/d/1dW1ukYlTu4vbm35bkf8MIZ3obP37yrKFz12X84ukOTU/edit?usp=sharing)
Delete Code Progress.pdf

This file has been moved to the [movement_validation Google Docs folder](https://docs.google.com/spreadsheets/d/1dW1ukYlTu4vbm35bkf8MIZ3obP37yrKFz12X84ukOTU/edit?usp=sharing)
Update README.md
Update and rename motif pipeline.md to Motif Pipeline.md
Update Guide for contributors.md
Update INSTALL.md
Update README.md
Update user_config_example.txt
Changed the user_config example path

Since I moved the example_movement_validation_data folder to within the
OpenWorm folders, I figured we could change it here.  Also I made the
EXAMPLE_DATA_PATH break over a line to fit into 80 characters.
Update install info to Google Drive from DropBox

In 4772ce9ed477dbc362d7291d4b1451525486b362 @JimHokanson changed our example data from DropBox to Google Drive.  Here I've modified the installation instructions to reflect this.
Removed reference to DropBox in WormPlotter.py
Removed reference to DropBox in INSTALL.md
Got plot_example.py working again