Version 1.1.0 Release

Including the following changes:

1. Implement issue #19.
2. Redesign algorithm selection from radio button group to drop-up.
3. Minimum map height has been reduced from 20 to 10.
4. Upgrade Bootstrap version to v3.4.1.
5. Move the location of the heuristic algorithm popover from right to top.
6. Fix a JavaScript error when clicking popover.

General Usability Improvements

Including the following changes: #4 #5 #6 #8 #13 #15