v3.0.0

• Only one dependency to DiskLruCache because apk size matters.
• Non coupled serializer, with cleaner implementation. Previously default json serializer is now a specific serializer which is available at com.vincentbrison.openlibraries.android:dualcache-jsonserializer:3.0.0.
• Internal optimizations for better performances.
• All the configuration is now done through Builder.class.
• Better access modifiers to fully hide internal classes.