Fixes Deprecation warnings for React 15.5.x, adds Prop-Types package …

[iamchrismiller]

…as dependency

[iamchrismiller]

This PR fixes the React 15.5.x Deprecation Warnings. #33

I noticed v1.0.8 was not tagged as a release.

This PR removes the support for versions < 15.5.0 so we may want to tag the current version v1.0.8 and tell users to use this tag if React < 15.5.

Let me know where I can help to get this merged In.

[iamchrismiller]

@kaivi Anything else you would like me to do to get this one rolling? PING

[drcmda]

@kaivi @iamchrismiller now that react fiber is out this component is down without this PR. If it's an abandoned repo should we fork?

[phipsy7]

Same problem here with react fiber. PING

[iamchrismiller]

@kaivi If you don't have time for this repo I wouldn't mind helping support it and get these PR's merged in.

[dkwingsmt]

I merged this PR in my fork at https://github.com/dkwingsmt/ReactInlineEdit , which is published as react-edit-inplace@1.0.9.