**Added:**

* <news item>

**Changed:**

* <news item>

**Deprecated:**

* <news item>

**Removed:**

* The ``xonsh`` code-base is no longer amalgamated, so tracebacks should be
  human-readable without intervention.  This may have (minor) impacts on startup
  speed.

**Fixed:**

* <news item>

**Security:**

* <news item>