MozTW Webthon #1

/space
1. sandstone style (f968ce479832af273bec96443b52698695e3a32f by @bobchao)
2. update information (2ed9264feb31489be60b7a66f811ac16a6bef37b , 6ab96ec499d8a1734cc3f79f16a00f67bda8ff94 by @bobchao)
3. add `hold event` description (b3547da5ed83527eb1fd8b1ffb397b7ea93741e9 by @chihsuan-huang)
4. update description and typo (c79a7538234576efdf1a047117dd70ad789cdc34, ff00ad0649eabd1362806880da3dc06972fd9731 by @chihsuan-huang)
5. beautify indent (02fb4a892b76a251459d4521d9e18fed4b849c8a by @mingtsay)
6. using OSM (03e8aec2d09725c5f98ab54a259ec2630e2d602c by @brandboat)
7. update description about Free Culture (4885dfca5732c6716eaaa67c7e2fa6225fc29b23 by @irvin)
8. add photo slide (9a53996fbab7ea298c0a839b448c1759a6d0988d by @alexsh)
9. translate into English (ae38da1a276e7a3d2b927ec9384e9b7a61dc4cbe by @chennien)

/foxmosa-dev
1. update css (6d27a92b4d272bbdb741e280b325e4bea1304413 by @chyuaner)

/firefox-new
1. update css (f0856038b2da49ebb8a0c8eb6c6551f46469135e by @Knight-X)

/sandstone
1. merge code into meta.shtml for tabzilla (c49b78887d0bd9b6adce174a23bf31130a401fbc by @chyuaner)

/404.shtml
1. sandstone style and `missingkids` (3dbada9e8ffced90ecbc39b69f372edeaa16b773 by @chihsuan-huang)

/inc/diff-new.html
1. fix OS X download btn link (73ce2d61b3e5dbab97668673da6365793f446b8c by @aznrogerazn)