Fixed minor build warnings for ePub3.xcodeproj
Removed warning-causing dylib linking for ePub3-iOS target
Merge pull request #60 from NYPL/feature/ePub3-iOS-build-fix

Fixes for various warnings in ePub3-iOS target
URL percent escape for unicode characters in filepath
Merge branch 'develop' of https://github.com/readium/readium-sdk.git into develop
Fix recursive calls on RDPackageResourceResponse::setOffset method.
Replace tabs with four spaces on Objective-C classes.