Feature layout constraints deactivation by convention

[zenangst]

• Improves the load signature by adding then label for the closure. It improves readability at the call-site.
• Swizzling and animations are now defaults set to true when loading the injection bundle.
• When a view is injected, .layoutConstraints will be deactivated before loadView is invoked. This saves you from adding it to your code-base.
• Updates the README to include the latest changes to the framework.

Loading the application bundle now looks like this:

Injection.load(then: loadApp)

[codecov-io]

Codecov Report

Merging #35 into master will decrease coverage by 0.62%. The diff coverage is 0%.

@@            Coverage Diff             @@
##           master      #35      +/-   ##
==========================================
- Coverage   57.74%   57.11%   -0.63%     
==========================================
  Files          20       20              
  Lines         549      555       +6     
==========================================
  Hits          317      317              
- Misses        232      238       +6

Impacted Files	Coverage Δ
Source/Shared/Injection.swift	28.72% <0%> (ø)	:arrow_up:
Source/Shared/View+Extensions.swift	0% <0%> (ø)	:arrow_up:

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