Fix the gradle build..

gif decoder is being built as a sub project while other dependencies are acquired via maven.
diff --git a/.gitignore b/.gitignore
index d857898..9c12c86 100644
--- a/.gitignore
+++ b/.gitignore
@@ -1,6 +1,7 @@
+.gradle
+build
 library/bin/*
 library/gen/*
-library/build/*
 library/local.properties
 library/.gradle
 library/.settings