Remove debug dump().
Fix keyword reference.
Simplify character class rules in grammar.
Return only the actual locale value from the parser.
Use external extractMeta module.
Fix typo.
Remove spurious debug log statement.
Restore the responseType feature for GM_xhr

Broken by 59f07764b8c975cc3cef451743e3f2754fc95f45 .

Fixes #2032
Define a lower wal_autocheckpoint for script value DBs.

Per comment by @VisualKei on #1879.

Fixes #2036
Update translations from babelzilla.org.
Version bump: 2.3beta1
Merge pull request #2028 from Ventero/parser

Some script parser changes.
Update translations from babelzilla.org.
Version bump: 2.3
[WIP] Move script injection into frame script for e10s.
[WIP] Pass URL to sandbox
[WIP] GM_rmc
[WIP] Remove aForce from withAllMenuCommandsForWindowId
[WIP] Remove unused/broken GM_BrowserUI observer

Since GM_BrowserUI is a function, the observer service calls it
directly instead of GM_BrowserUI.observe.
[WIP] Remove unnecessary page{hide,show} listeners in GM_BrowserUI