Revert "Use sblint-reviewdog."

This reverts commit d5a346d6c3.

.travis.yml

@@ -23,12 +23,23 @@ install:
   # Install Roswell
   - curl -L https://raw.githubusercontent.com/snmsts/roswell/$ROSWELL_BRANCH/scripts/install-for-ci.sh | sh
 
+  # Install reviewdog
+  - if [ "$REVIEWDOG" ]; then
+      mkdir -p ~/go/bin;
+      curl -L https://github.com/haya14busa/reviewdog/releases/download/$REVIEWDOG_VERSION/reviewdog_linux_386 > ~/go/bin/reviewdog;
+      chmod u+x ~/go/bin/reviewdog;
+    fi
   # Install SBLint
   - if [ "$REVIEWDOG" ]; then ros install fukamachi/sblint; fi
 
   # Install prove
   - ros install prove
 
+cache:
+  directories:
+    - "$HOME/.roswell"
+    - "$HOME/.config/common-lisp"
+
 before_script:
   - ros --version
   - ros config
@@ -39,4 +50,7 @@ script:
     else
       run-prove t-*.asd;
     fi
-  - if [ "$REVIEWDOG" ]; then sblint-reviewdog; fi
+  - >-
+    if [ "$REVIEWDOG" ]; then
+      sblint | reviewdog -efm="%f:%l:%c: %m" -diff="git diff master" -ci=travis;
+    fi