testing: nofuse testing (for osx travis)

Makefile

+
+ifeq ($(TEST_NO_FUSE),1)
+go_test=go test -tags nofuse
+else
+go_test=go test
+endif
+
+
 all:
-	# no-op
+	# no-op. try:
+	#   make install
+	#   make test
 
 godep:
 	go get github.com/tools/godep
@@ -32,13 +42,13 @@ test_3node:
 	cd test/3nodetest && make
 
 test_go_short:
-	go test -test.short ./...
+	$(go_test) -test.short ./...
 
 test_go_expensive:
-	go test ./...
+	$(go_test) ./...
 
 test_go_race:
-	go test ./... -race
+	$(go_test) ./... -race
 
 test_sharness_short:
 	cd test/sharness/ && make

core/commands/internal/incfusever/doc.go

+// Package incfusever is only here to prevent go src tools (like godep)
+// from thinking fuseversion is not a required package. Though we do not
+// actually use github.com/jbenet/go-fuse-version as a library, we
+// _may_ need its binary. We avoid it as much as possible as compiling
+// it _requires_ fuse headers. Users must be able to install go-ipfs
+// without also installing fuse.
+package incfusever

core/commands/internal/incfusever/incfusever.go

-// Package incfusever is only here to prevent go src tools (like godep)
-// from thinking fuseversion is not a required package. Though we do not
-// actually use github.com/jbenet/go-fuse-version as a library, we
-// _may_ need its binary. We avoid it as much as possible as compiling
-// it _requires_ fuse headers. Users must be able to install go-ipfs
-// without also installing fuse.
+// +build !nofuse
+
 package incfusever
 
 import (

fuse/readonly/doc.go

+// package fuse/readonly implements a fuse filesystem to access files
+// stored inside of ipfs.
+package readonly

fuse/readonly/readonly_unix.go

 // +build linux darwin freebsd
 // +build !nofuse
 
-// package fuse/readonly implements a fuse filesystem to access files
-// stored inside of ipfs.
 package readonly
 
 import (