docs(ngForm): fix grammar and improve explanation

Closes #4050
docs(guide/i18n): change non-existent de-ge to de-de

The de-ge locale does not exist

Closes #4053
docs(guide/services): explain services in plain language

See the discussion at http://docs.angularjs.org/guide/dev_guide.services.understanding_services#comment-1002821035

Closes #4055
docs(guide/services): rewording of explanation
docs(FAQ): update jQuery compatibility
docs($exceptionHandler): add an example of overriding the handler

Closes #3816
doc(ngApp): fix grammar
docs(input): fix spelling error and reword for clarity
docs(ngModelController): clarify issue with isolated scope directive

See #4043
fix(ngView): IE8 regression due to expando on non-element nodes

This fixes the "TypeError: Object doesn't support this property or method" error on IE8,
when view templates contain leading white-space.

Closes #3971