cannot.find.zip.align=The zipalign tool was not found in the SDK.
Please update to the latest SDK and re-export your application
or run zipalign manually.
Aligning
If you are using gradle just update ypur gradle plugin!
Change line in build.gradle from:
classpath 'com.android.tools.build:gradle:0.9.+'
to:
classpath 'com.android.tools.build:gradle:0.11.+'
It works for me.
Note that variable buildToolsVersion (for me "20.0.0") must match your version of build-tools.
Good luck :)