Remove "cpp-v8-extra" string from locales

As the choice itself was pruned in 0aa78e7 (see gh-129),
  logical thing is to get rid of its translations too.

Signed-off-by: Aleksandrs Ļedovskis <aleksandrs@ledovskis.lv>
Make site usable for IE8 folks

Changed indexOf to jQuery alternative that internally
  uses native indexOf if that is available

Modify CSS to display default background-color - makes button
  non-transparent in IE

Signed-off-by: Aleksandrs Ļedovskis <aleksandrs@ledovskis.lv>
Move language code to "lang" query parameter

Closes gh-108

Signed-off-by: Aleksandrs Ļedovskis <aleksandrs@ledovskis.lv>
Merge pull request #132 from aledovsky/chore/remove_v8monkey_strings

Remove "cpp-v8-extra" string from locales
Merge pull request #131 from aledovsky/bug/ie8_fixes

Make site usable for IE8 folks
Merge pull request #130 from aledovsky/feature/move_lang_state_to_query_param

Move language code to "lang" query parameter