Prepare for v0.2.4 release

Prepare for v0.2.3 release

v0.2.2 release

Add minified CSS to 0.2.1 files, update CONTRIBUTING.md for future re…

…leases

cc @DmitrySharabin

Release v0.2.0

Re-use objects created by getData(): 50% speedup in expression evalua…

…tion

Prepare for 0.1.5 release

Prepare for v0.1.4 release

Update package.json for new version

Uploads must use fork URL, resolves mavoweb#235