Implement support for Parcels lib

Parcels lib:

   compile 'org.parceler:parceler-api:1.1.5'
    apt 'org.parceler:parceler:1.1.5'

For example this lib:

compile 'com.hannesdorfmann.fragmentargs:annotation:3.0.2'
    apt 'com.hannesdorfmann.fragmentargs:processor:3.0.2'
 compile 'com.hannesdorfmann.fragmentargs:bundler-parceler:2.1.2'

Supports the parceler lib like this:

   @Arg(bundler = ParcelerArgsBundler.class) public AnyItem item;

Add please support of lib parceler

[MarcinMoskala]

@PingForward please check out version 0.70-beta.1 Changes to apply:

• There is no more dependency on the extra module. Parceler has now native support. You need to have a dependency to Parceler!
• Delete converter in configuration
• Change @Arg to @Arg(parceler = true) before any element that you want to wrap and unwrap by Parceler.

Please let me know if everything is ok.

[thats-bot]

Why you choose this way? I mean why you define ParcelarArgConverter.class as one global config for all activties and fragments? Why not to use it for every specified argument? This way give much more flexibility to the user @Arg(bundler = ParcelerArgsBundler.class)