Adding support for styling the show map button next to the selectbox

This required a small tweak to the JS. I went ahead and added the radix
parameter to parseInt calls.
Merge pull request #3 from borkweb/support-for-styling-button-near-box

Adding support for styling the show map button next to the selectbox
now works for default timezones

This includes:
- modifications to timezone-picker
- default timezone selection
- other small tweaks