Replace partial lookup rescue blocks.

They now have pre-emptive if statements.
Merge pull request #47 from katalyst/change/partial-lookups

Replace partial lookup rescue blocks.
Added version file
Merge branch 'v1.0.0.beta' of github.com:katalyst/koi into v1.0.0.beta
Merge branch 'v1.0.0.beta' into 1.0.0.beta/navigator