Add aar to mavenCentral with proguard rules

[andrey-shikhov]

It will be great to have aar available in repository instead of simple jar - there you can add proguard rules inside of archive and they automatically will be merged to project rules, so you only need to add acra to dependencies without touching proguard files.
It is also good when class structure of library changes, so no need in keeping proguard file up to date.

See
http://stackoverflow.com/questions/24309950/create-aar-file-in-android-studio
to build aar(android library)

[william-ferguson-au]

Happy to take a pull request

[funtax]

As far as I know, ACRA 4.7 is packaged as an AAR. Does this already imply the Proguard-mappings, or is this still an open task?

[william-ferguson-au]

Adding the Proguard-mappings into the AAR is still an open task. This task.

[william-ferguson-au]

Resolved in #346