fixed Makefile target.

Signed-off-by: Bo-Yi Wu <appleboy.tw@gmail.com>
add grunt-contrib-htmlmin plugin to minify handlebar template file.

Signed-off-by: Bo-Yi Wu <appleboy.tw@gmail.com>
fxied minify templates.

Signed-off-by: Bo-Yi Wu <appleboy.tw@gmail.com>