Add link to TestCase documentation

Fixes gh-109.
Change wording in views section per @riseriyo's feedback

Fixes gh-111
Clarify wording in missing views test

Fixes gh-112.
Trim trailing whitespace
Fix wording per @riseriyo's suggestion

Fixes gh-113.
Add hint about empty clause

Fixes gh-114.
Change wording in more views

Fixes gh-115.
Fix pluralization wording per @riseriyo's advice

Fixes gh-118.
Change wording per @riseriyo's advice

Fixes gh-119.
Improve wording in forms section per @riseriyo

Fixes gh-120.
Clarify redirect instructions (per @riseriyo)

Fixes gh-121.
Remove duplicate sentence (per @riseriyo)

Fixes gh-122.
Add more to template tags hint (per @riseriyo)

Fixes gh-123.
Update SlugField editable tip (per @riseriyo)

Fixes gh-131.
Edit doc on edit detail view and urls
Edit doc on edit detail view template
Edit migration explanation for user friendliness
Add tip on reverse
Reverted correction in `test_many_posts` to match hints
Merge pull request #148 from pythonsd/incorporate-feedback-from-rise

Incorporate feedback from Rise's issues