Use anonymous sorting function in ArrayHelper::sortObjects
Add private constructor to disallow instantiation of ArrayHelper
Update README.md

Fixes issue #55
Update README.md

Fixes issue #56
Merge pull request #70 from davidhurley/patch-2

Update View README.md
Merge pull request #69 from davidhurley/patch-1

Update Model README.md
Add missing test files.
Fix up problem test files.
Updates to main README and CONTRIBUTING files.

Closes #9.
Closes #71.
Adding sublime text link on how to install use it with PHPCS [ci skip]
Make tests for Archive run standalone

Refs #4
Make tests for Client package run standalone

Refs #4
Make test for Crypt package run standalone.

Refs #4
Make tests for Filter package run standalone

Refs #4
Make tests for Keychain package run standalone

Refs #4
Rewrite the profiler
Fix code style
Merge pull request #74 from florianv/profiler2

Rewrite the profiler. Thanks @florianv
Update readme
General improvements to ArrayHelper (type hinting, scope, passing by
value)

- Add type hinting to array argument in toObject, toString, getColumn,
  invert, isAssociative, pivot, sortObjects, getValue
- Pass variables by value, not by reference (in methods without side
  effects applied to the arguments. So toInteger is an exception)
- toString's array argument is required, not default null
- Make arrayFromObject private (no use having protected methods in a final
  class)