added load spinner, fixed IE contains error, and decreased timeline script load time
added load spinner, fixed IE contains error, and decreased timeline script load time

ericwhyne/open-catalog-generator,tjd08a/open-catalog-generator,tjd08a/open-catalog-generator,snordt/open-catalog-generator,ericwhyne/open-catalog-generator,tjd08a/open-catalog-generator,ericwhyne/open-catalog-generator,snordt/open-catalog-generator,snordt/open-catalog-generator,ericwhyne/open-catalog-generator,tjd08a/open-catalog-generator,snordt/open-catalog-generator