update Sticky plugin:
- add `bottom` option
- resolved #55
- add placeholder to wrap sticky element
add `.am-animation-paused` class
Merge pull request #65 from allmobilize/codename-h

Codename h
Merge pull request #66 from allmobilize/hzp

fix #59 popover.js position
update progress & popover style
Merge branch 'master' of https://github.com/allmobilize/amazeui into codename-h
Merge pull request #67 from allmobilize/codename-h

Codename h