Fix SDK loading in Nightly.

Fixes GH-200
Prevent scriptish from early-initializing documentElement.

This prevented some "load" listeners in windows from firing.
Fix GM_xmlhttpRequest in Firefox 32+

See discussion in https://bugzilla.mozilla.org/show_bug.cgi?id=1031336

Closes GH-246
Closes GH-247
Don't use __proto__

Closes GH-236
Make GM_apiLeakCheck exit after encoutering main script injector

Closes GH-231
Closes GH-238
Closes GH-237
Fix first run code (Australis)

Was a prelim review note of 0.1.12
Fix aboutScriptish.js loading too early
Fix logger tests
Check that a gBrowser actually has a selectedBrowser

Came up in prelim. of 0.1.12
Bump min/maxVersions
Re-enable grant sniffing!

The world (meaning I) is not ready get for @grant :p
Closes GH-226 (and probably numerous others)
Reverts part of 0f767fa4c11b03501432ff49c63b99b12dffc103
GM_xpath is a sandbox function and should be always available
Merge sandboxScripts again.