include custom ant rules to make javadoc: `ant javadoc`

Not much to see here, but should be useful in the near future.
include binary shared libs that are used only for linking against

In order to build the native parts, they need to be linked against openssl
and SQLCipher.  For deployments, these libraries are provided elsewhere, so
include binaries in git that are good enough for linking against.

libcrypto.so came from android-15 4.0.3 emulators from the Android SDK

libsqlcipher_android.so came from SQLCipher+for+Android+v3.1.0.zip SHA-256:
9568592f14d8b28d586b742cebb4e032f1f42888a67cdb4685b217d1285a1dbd
run native build as part of the ant build process

This means all you have to run in `ant clean debug`
Eclipse ADT wants to update .classpath again...
update sqlcipher submodule to v3.1.0, same as included libsqlcipher.so

Keep the headers and the shared lib in sync for clean linking.