travis: test nimble against the important packages list

Author: alaviss

.travis.yml

@@ -45,6 +45,8 @@ script:
   - nim c -r tester
   - cd ..
   - ./src/nimble install -y
+  - cd ~/.choosenim/toolchains/nim-$BRANCH
+  - nim c -r testament/testament cat nimble-packages
 
 notifications:
   irc: "chat.freenode.net#nimbuild"