test($http): test that timed out $http request rejects promise

Closes #7688
Closes #7686
docs($http): remove duplicate 'to' in withCredentials description

Typo in $http config documentation

Closes #7731
chore(CHANGELOG.md): add changes for 1.2.17 and 1.3.0-beta-11
docs(tutorial): mention additional Debian install step

Thanks to GSC Leticia (gsc-leticia) for identifying this problem.

Closes #7665
perf(isArray): use native Array.isArray

see benchmark: http://jsperf.com/isarray-performance

Closes #7735
docs(error/$rootScope/inprog): improve understanding and diagnosis of the error

See #5549
docs(guide/databinding): add line breaks after images

This looks much better, thanks a bunch @NV

Closes #7748
docs(CHANGELOG.md): remove mention of strict-DI from v1.2.17

Strict-DI feature was originally merged into v1.2.x, but was reverted by https://github.com/angular/angular.js/commit/373078a94cf3d525b9ae11a2f2876acb6e26f6a3