Added <options/> support to Proguard configuration

Additional Proguard options can be added using an <options/> element,
allowing to configure the plugin in a super POM.
fix: use parsedOptions instead of proguardOptions
use the recommended way to provide the obfuscated jar name to DexMojo
fixed checkstyle violations
Added <options/> support to Proguard configuration

Additional Proguard options can be added using an <options/> element,
allowing to configure the plugin in a super POM.
fix: use parsedOptions instead of proguardOptions
use the recommended way to provide the obfuscated jar name to DexMojo
fixed checkstyle violations
Merge branch 'proguard-options' of git.ascelion.com:android/android-maven-plugin into proguard-options