Update travis cfg to run full test suite + gofmt + lint. (#49)

Update travis cfg to run full test suite + gofmt + lint.

.travis.yml

 language: go
-
-script: make build/runtime.pass
+# Upgrade default Travis pip which is old and doesn't work the way we expect.
+# Need sudo to do that.
+sudo: required
+install: pip install --upgrade pip
+# Run gofmt and lint serially to avoid confusing output. Run tests in parallel
+# for speed.
+script: make gofmt lint; make -j2 test

Makefile

@@ -159,7 +159,7 @@ $(PYLINT_BIN):
 	@pip install --install-option=--install-scripts='$(ROOT_DIR)/build/bin' --target '$(PY_DIR)' pylint
 
 pylint: $(PYLINT_BIN)
-	@$(PYLINT_BIN) compiler/*.py tools/{benchcmp,coverparse,diffrange,grumpc,grumprun}
+	@$(PYLINT_BIN) compiler/*.py $(addprefix tools/,benchcmp coverparse diffrange grumpc grumprun)
 
 lint: golint pylint