Reorganized file structure

src/errors/InvalidDirectory.go

@@ -1,17 +0,0 @@
-package errors
-
-import "fmt"
-
-// InvalidDirectory errors are returned when the specified path is not a directory.
-type InvalidDirectory struct {
-	Path string
-}
-
-// Error implements the text representation.
-func (err *InvalidDirectory) Error() string {
-	if err.Path == "" {
-		return "Invalid directory"
-	}
-
-	return fmt.Sprintf("Invalid directory '%s'", err.Path)
-}

src/errors/RegisterInUse.go

@@ -1,14 +0,0 @@
-package errors
-
-import "fmt"
-
-// RegisterInUse errors are returned when a register is already in use.
-type RegisterInUse struct {
-	Register string
-	User     string
-}
-
-// Error implements the text representation.
-func (err *RegisterInUse) Error() string {
-	return fmt.Sprintf("Register '%s' already used by '%s'", err.Register, err.User)
-}