Adding some charsets

Newer versions of MySQL have more UTF-8 collations in addition to the
new utf8_mb4 charset/collation.

For some additional information about utf8_mb4, please refer to
http://dev.mysql.com/doc/refman/5.5/en/charset-unicode-utf8mb4.html
allows add multiple submit buttons in "selectable" mode in SQLFORM.grid (with different decorate css classes)
updating jquery mobile to 1.3.1
syntax fix for python 2.5
files toggle in admin, not yet as I would want it
setting locale to default, fixed issue 1583, thanks ozancag
normalized behaviour in A() handler, fixed anonymous function block.
first step to a nicer code style of admin
Merge pull request #124 from oliveiraev/fix-pymysql-charset

Adding some charsets
Merge branch 'master' of github.com:web2py/web2py
Merge pull request #131 from swayf/feature/multiple_submit_buttons_in_grid

allows add multiple submit buttons in "selectable" mode in SQLFORM.grid ...
Merge branch 'master' of github.com:web2py/web2py
Merge pull request #132 from mpranjic/masterfix

updating jquery mobile to 1.3.1
Merge branch 'master' of github.com:web2py/web2py
Merge pull request #133 from niphlod/feature/js_inline

normalized behaviour in A() handler, fixed anonymous function block.
Merge branch 'master' of github.com:web2py/web2py
Merge pull request #134 from niphlod/issue/admin_refactor

first step to a nicer code style of admin
Merge branch 'master' of github.com:web2py/web2py
moved the locals restoring logic, thanks ozancag
reduced memory footprint by conditionally loading Tk