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
Added browser shim.
Merge pull request #46 from katalyst/change/pow

.powrc
Merge branch 'v1.0.0.beta' of github.com:katalyst/koi into v1.0.0.beta
Updated bowerbird_v2.
Mergery.