Update README to use gradle annotation processor instead of android-apt

[tc]

The readme states to use apply plugin: 'com.neenbedankt.android-apt'

"The Android plugin annotation processor works with both javac and jack, unlike android-apt which only works with javac. For more info you can refer to the docs (scroll down a bit on that page)."
see http://www.littlerobots.nl/blog/Whats-next-for-android-apt/

https://bitbucket.org/hvisser/android-apt/wiki/Migration

[AndyLeeBlue]

To add the library to your app's build.gradle file:

annotationProcessor 'com.bluelinelabs:logansquare-compiler:1.3.6'
compile 'com.bluelinelabs:logansquare:1.3.6'

[moorthysubu]

In gradle version 3.1.4 if annotationProcessor 'com.bluelinelabs:logansquare-compiler:1.3.6' added then data binding is not working, classes are not generated so is there any way to use this line in this gradle version with sdk level 27? Can anyone help me on this