Updated "main features" as visible from PyPI

Author: tleonhardt

setup.py

@@ -29,13 +29,14 @@
     - Multi-line, case-insensitive, and abbreviated commands
     - Special-character command shortcuts (beyond cmd's `@` and `!`)
     - Settable environment parameters
-    - Parsing commands with flags
+    - Parsing commands with arguments using `argparse`, including support for sub-commands
     - Unicode character support (*Python 3 only*)
-    - Good tab-completion of commands, file system paths, and shell commands
+    - Good tab-completion of commands, sub-commands, file system paths, and shell commands
     - Python 2.7 and 3.4+ support
     - Linux, macOS and Windows support
     - Trivial to provide built-in help for all commands
     - Built-in regression testing framework for your applications (transcript-based testing)
+    - Transcripts for use with built-in regression can be automatically generated from `history -t`
 
 Usable without modification anywhere cmd is used; simply import cmd2.Cmd in place of cmd.Cmd.
 """