Documentation and testing improvements.

v1.0.5

TDP-1887 Don't init a SplitIO factory twice, even if the original was…

v1.0.4

TDP-1887 Improve documentation.

v1.0.3

Provider is no longer deferrable.

v1.0.2

Defer provider creation.

v1.0.1

TDP-1887 Improve documentation.

v1.0

TDP-1887 Defer provider creation.

v0.1.7

TDP-1887 Make missing treatment keys a soft error.

v0.1.6

TDP-1887 Catch exceptions during installation so that registration ca…

v0.1.5

TDP-1887 Correct provider path.

v0.1.4

TDP-1887 The provider doesn't need a subdir.