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
docs(CHANGELOG.md): remove mention of strict-DI

Strict-DI feature was originally merged into v1.2.x, but was reverted by https://github.com/angular/angular.js/commit/373078a94cf3d525b9ae11a2f2876acb6e26f6a3
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
docs(ngController): improve wording
docs(guide): add ngTagsInput to UI Widgets
docs(guide): add UI-Map to Complementary Libraries
docs(guide/index): add codeschool link
docs(error/$sce/unsafe): suggest including ngSanatize
docs(tutorial/step_09): note about 'Filter' suffix

Reminder that 'Filter' is appended to filter names when injected.
Link to Filter guide where this is mentioned.
docs(directive/input): document ngTrim for textarea
docs(error/$compile/tplrt): note that html comments can cause this
docs(api/index): add Oxford comma

Verified grammar at https://owl.english.purdue.edu/owl/resource/607/01/
docs($animate): $animate.enabled's param is optional

The docs show that param 'element' (of type DOMElement) is required when it is optional.
docs(tutorial/step_09): fix link to filter guide
docs(tutorial/step_09): fix formatting
chore(jshint): dedupe jshint option
docs(loader): improve explanation of modules
docs(guide/services): fix link to wikipedia article containing parentheses

Fix in a mis-parsed link with ')' symbol in it