Migration to swift-mode

swift3-mode has been merged into swift-mode. Please uninstall swift3-mode and install swift-mode.

Added REPL

v2.1

Bump version to 2.1

Renamed symbol name prefix from swift-mode to swift3-mode

v2.0

Bump version to 2.0

The initial version

The basic functionality seem to be working, but lacks automated tests and documents.