Use vendored modules

Signed-off-by: Izuru Yakumo <yakumo.izuru@chaotic.ninja>

git-svn-id: file:///srv/svn/repo/aya/trunk@67 cec141ff-132a-4243-88a5-ce187bd62f94

vendor/github.com/yosssi/gcss/context.go

@@ -0,0 +1,15 @@
+package gcss
+
+// context represents a context of the parsing process.
+type context struct {
+	vars   map[string]*variable
+	mixins map[string]*mixinDeclaration
+}
+
+// newContext creates and returns a context.
+func newContext() *context {
+	return &context{
+		vars:   make(map[string]*variable),
+		mixins: make(map[string]*mixinDeclaration),
+	}
+}