tferr/Scripts: BAR 1.5.1

This is the largest update so far. Highlights:

• Several IJ1 plugins rewritten as IJ2 Scijava commands
• All core files are now distributed inside a single jar, and are no longer spread across the ImageJ directory
• Offline help displays the README.md files displayed by GitHub when browsing directories in the repository
• Several routines for time series analysis (such as calcium imaging experiments)
• Several scripts are now installed in the Script Editor Templates menu
• User scripts are now placed in a more convenient location: the /scripts/BAR/ directory in ImageJ root directory (rather than the convoluted /plugins/scripts/BAR/(...) location
• My Routines supersedes My Snippets
• BAR is now more diverse with code written in more languages e.g., Clojure and Groovy
• Support for multichannel profiles for images with more than 7 channels

[Uploaded to the BAR update site on 2017.04.05]