REMOVE ME/DO NOT MERGE debug flags for native builds

Do not ever include this commit in the official repo!  Its for debugging only!
REMOVE ME/DO NOT MERGE enable debug logs

Do not ever include this commit in the official repo!  Its for debugging only!
bump targetSdkVersion to 21
bump versionCode to 3020 to give room for 0.3.1.x releases for non-PIE

In case anyone wants to make non-PIE fix releases based on 0.3.1, setting
the version code to allow for that possibility.
set minSdkVersion to 16, the earliest platform to support PIE

android-21 now requires -pie -fPIE on all executables to run, but PIE was
not supported until android-16.

https://code.google.com/p/android-developer-preview/issues/detail?id=888
android-support-v4.jar properties file to set javadoc path
update to latest appcompat-v7 (v21.0.3)
update to npth v1.0
update gnupg to v2.1.0
update to gpgme v1.5.3
update libassuan to v2.2.0
update to libgcrypt v1.6.2
update libgpg-error to v1.17
update libksba to v1.3.2