modified the build grab the signing config properties from local.properties instead of the system-wide gradle.properties and to only apply them if the key store file exists so other users can build without modifications
modified the build grab the signing config properties from local.properties instead of the system-wide gradle.properties and to only apply them if the key store file exists so other users can build without modifications

ngageoint/disconnected-content-explorer-android,ngageoint/disconnected-content-explorer-android,ngageoint/disconnected-content-explorer-android