Idiomatic assertion now correctly verifies fields

This fixes #161
Fixed failing test for public readonly fields
Merge branch '161-cima-field' of https://github.com/adamchester/AutoFixture into adamchester-161-cima-field
Suppressed a compiler warning in a unit test,

because the purpose of the PublicReadOnlyFieldNotInitializedByConstructor
is exactly to misbehave.
Incremented patch version,

in order to indicate a bug fix. This resolves #161
(https://github.com/AutoFixture/AutoFixture/issues/161).