Pod name is `keyframes` instead of `Keyframes`

[sampsakuronen]

Readme states that pod name is Keyframes. This seems to be case sensitive though, as a specification with that name can't be found. By using keyframes (lower cased) the pod can be installed.

In Podfile: pod 'Keyframes'

pod install
Analyzing dependencies
[!] Unable to find a specification for `Keyframes`

And then:Podfile - pod 'keyframes'

pod install
...
Installing keyframes (1.0.0)