Fix a crash in LiveAuthRefreshRequest

_client will be released in dealloc, but not retained in init method.
The fix retains the object in init method.
Merge branch 'master' of github.com:liveservices/LiveSDK-for-iOS
Update License expiration date
Add 64bit support.
Update README.mdown
Update readme
Update readme with correct information
Delete LiveSDK.framework output
Fix memory leaks
Merge pull request #31 from yamakiyo/master

Fix memory leaks
Added stack overflow link to README
Replacing existing license with Apache 2.0
Merge pull request #34 from rgregg/master

Replacing existing license with Apache 2.0