Improve custom animations, trailWidth option

This changes the behavior of custom animation support, but API stays the same

• Add trailWidth option
• Improve custom animations support. User doesn't have to interpolate values anymore.
• Throw error if progress bars are initialized without new keyword
• Fix bug if empty opts was passed

#breaking destroy(), stop(), svg

This release contains additions and modifications to API

• Add destroy() method
• Add stop() method
• Add svg attribute for built-in shapes
• Round progress from .value() to prevent returning very small number like 1e-30
• Add license banner to distributable files

Add version banner to released files

0.5.6

Release 0.5.6

Add .value() method

0.5.5

Release 0.5.5

Fix browserify usage

This release does not change functionality of ProgressBar.

• Change main script to point to source file instead of bundled file to prevent browserify including shifty twice.

Add shifty back as NPM dependency for Browserify

This release does not change functionality of ProgressBar.

This release was rushed and the changes should have been released same time with 0.5.4

Fix debugging with dev version

This release does not change functionality of ProgressBar.

• Removed --debug flag from Browserify command because it made debugger show incorrect lines. That happens because shifty is bundled inside final script.

Switch to Browserify

This release does not change functionality of ProgressBar.

• Custom UMD module definition was removed from source code and Browserify generates it instead.
• Removed shifty from this repository and defined it as a npm dependency.

Add attachment support for custom animations

Add new option called attachment for Path. This also changes API for step function with built-in shapes.

Custom animations and minor API additions

• Add custom animation support
• Add references to path and trail

There was some hassle with 0.4.0 being accidentally a branch and tag so released a new 0.4.1 just in case.