GF-59152: Add flag to control calling preventDefault for a captured event.

Enyo-DCO-1.1-Signed-off-by: Aaron Tam <aaron.tam@lge.com>
Merge pull request #656 from enyojs/GF-59152-aarontam

GF-59152: Add flag to control calling preventDefault for a captured event.

Reviewed-By: Ben Combee (ben.combee@lge.com)
Fixes encountered while working on demo app.
Enyo-DCO-1.1-Signed-Off-By: Kevin Schaaf (kevin.schaaf@lge.com)
Merge Collection destroy updates from master to 2.3.0-release-candidates.
Enyo-DCO-1.1-Signed-Off-By: Kevin Schaaf (kevin.schaaf@lge.com)
Use relative URL's when compiling less files in lessc.sh and minify.js.  Adds less.js file, which sets the relativeURLs flag then loads the client-side less compiler.
Enyo-DCO-1.1-Signed-Off-By: Kevin Schaaf (kevin.schaaf@lge.com)
Update changelog.
Enyo-DCO-1.1-Signed-Off-By: Kevin Schaaf (kevin.schaaf@lge.com)
Merge pull request #657 from enyojs/moon-flickr-master

Grab bag of fixes and usability improvements resulting from demo app development
Update version string to 2.4.0-pre.1