Merge branch 'hotfix/0.1.2'
Merge branch 'release/0.2'
Merge branch 'hotfix/0.2'
Merge branch 'release/0.3'
Merge branch 'release/0.4.0'
Merge branch 'release/v0.5.0'
Bumping version to 0.5.1
Adding example of choice validation
Added Exception getMessages() example
Increasing flexibility in ValidationChoice constructor
Adding possibility to add validators later in a choice and preparing for zero
Adding test for zero in a combo
Adding custom validator example
Setting default validator message
Adding CONTRIBUTE.md
Simplifying Readme file
Allowing construct with validators in combo
Adding list of validators to readme
Merge branch 'hotfix/v0.5.1' into develop

Conflicts:
	README.md