Restore 'skip_cleanup' (misunderstood deprecation)

Author: tonyelewis

.travis.yml

@@ -110,6 +110,7 @@ deploy:
     - "$TRAVIS_BUILD_DIR/release_build/cath-resolve-hits.$BUILD_FILE_SUFFIX"
     - "$TRAVIS_BUILD_DIR/release_build/cath-ssap.$BUILD_FILE_SUFFIX"
     - "$TRAVIS_BUILD_DIR/release_build/cath-superpose.$BUILD_FILE_SUFFIX"
+  skip_cleanup: true
   on:
     condition: "$BUILDTYPE == RELEASE && $CC =~ ^gcc"
     repo: UCLOrengoGroup/cath-tools