use 'dev' and 'release' build tags for better env-based compilation

.travis.yml

@@ -20,4 +20,4 @@ install:
 script:
 - ./scripts/build.sh
 - ./bin/kelp version
-- go test --short ./...
+- go test -tags dev --short ./...

gui/filesystem_vfsdata_debug.go → gui/filesystem_vfsdata_dev.go

@@ -1,4 +1,4 @@
-// +build debug
+// +build dev
 
 package gui
 

scripts/build.sh

@@ -85,7 +85,7 @@ then
     mkdir -p bin
 
     echo -n "compiling ... "
-    go build -tags debug -ldflags "$LDFLAGS" -o $OUTFILE
+    go build -tags dev -ldflags "$LDFLAGS" -o $OUTFILE
     BUILD_RESULT=$?
     if [[ $BUILD_RESULT -ne 0 ]]
     then
@@ -145,7 +145,7 @@ do
     fi
 
     # compile
-    env GOOS=$GOOS GOARCH=$GOARCH GOARM=$GOARM go build -ldflags "$LDFLAGS" -o $BINARY
+    env GOOS=$GOOS GOARCH=$GOARCH GOARM=$GOARM go build -tags release -ldflags "$LDFLAGS" -o $BINARY
     BUILD_RESULT=$?
     if [[ $BUILD_RESULT -ne 0 ]]
     then

scripts/fs_bin_gen.go

@@ -11,7 +11,7 @@ func main() {
 	fs := http.Dir("./gui/web/build")
 	e := vfsgen.Generate(fs, vfsgen.Options{
 		Filename:        "./gui/filesystem_vfsdata_release.go",
-		BuildTags:       "!debug",
+		BuildTags:       "release",
 		PackageName:     "gui",
 		VariableName:    "FS",
 		VariableComment: "file system for GUI as a blob",