fsplc and fsplmod use rooted paths to identify things

Remedies #71

cmd/fsplmod/main.go

@@ -46,6 +46,9 @@ func main () {
 		}
 		
 		dir := cli.Args[0]
+		if abs, err := filepath.Abs(dir); err == nil {
+			dir = abs
+		}
 		_, err := os.Stat(dir)
 		if err != nil {
 			err := os.Mkdir(dir, 0755)
@@ -79,6 +82,9 @@ func main () {
 		}
 		
 		dir := cli.Args[0]
+		if abs, err := filepath.Abs(dir); err == nil {
+			dir = abs
+		}
 		metadataPath := filepath.Join(dir, "fspl.mod")
 		file, err := os.OpenFile(metadataPath, os.O_RDWR, 0644)
 		handleErr(cli, err, 1)

compiler/compile-unit.go

@@ -40,7 +40,7 @@ func (this *Compiler) CompileUnit (address entity.Address) error {
 	// if the output file is unspecified, generate a nickname from the
 	// input address. if that doesn't work, default to "output"
 	if this.Output == "" {
-		nickname, ok := address.Nickname()
+		nickname, ok := entity.Address(path).Nickname()
 		if !ok { nickname = "output" }
 		this.Output = this.Filetype.Extend(nickname)
 	}