extend @HttpsClient to support resName (library project) #1028

related: #20, #306

We tried creating a custom HttpClient in our library project. BTW today is 5th June - check out https://www.resetthenet.org/ - makes you want to secure all your apps :)

@HttpsClient(trustStore=R.raw.mycacerts,
        trustStorePwd="changeit2")
    HttpClient httpsClient;

Using the latest 3.1 SNAPSHOT we cannot compile because the Resource is in a library project and since resources in library projects are not final static we cannot specify our truststore directly as a resource (in this case R.raw.mycacerts).

https://github.com/excilys/androidannotations/wiki/Library-projects#referencing-ids-by-name suggests referencing the resources by resName, however that is mostly possible for layouts but not for Annotations such as @HttpsClient. Can we please add a support for resName as well? resName would reference the truststore and/or the keystore resources.