AdaptiveTableLayout unnecesary sets allowBackup attribute

[vyguera]

Setting allowBackup attribute on my own application element at AndroidManifest makes an error with AdaptiveTableLayout, as its library Manifest already sets its own value for this attribute. Therefore is required to also set tools:replace="android:allowBackup in order to replace this value.

Error:Attribute application@allowBackup value=(false) from AndroidManifest.xml:10:9-36 is also present at [com.cleveroad:adaptivetablelayout:1.2.1] AndroidManifest.xml:12:9-35 value=(true).
Suggestion: add 'tools:replace="android:allowBackup"' to <application> element at AndroidManifest.xml:8:5-24:19 to override.

See http://g.co/androidstudio/manifest-merger for more information about the manifest merger.

[vyguera]

I have fixed it in pull request #41