update mongodb to 1.4.12
Typo fix: Live Examples link https -> http
Merge pull request #2323 from zheng1/master

update mongodb to 1.4.12
Merge pull request #2324 from emgeee/master

Typo fix: Live Examples link https -> http
Remove hoisted function from Query constructor
Get rid of another hoisted function in query
Merge branch 'master' into gh-860