Bump version number in PKG-INFO
Bump version to 0.5b.

- Fix: Add "purge_received" and "purge_sent" to built-in list.
Fix comprehension namespace issue. Add lamutex.da.
Fix wildcard pattern.

This now allows the message type to be a free variable (by using wildcard "_")
in message patterns.
Bump version to 0.6.
Bump version to 0.6a.

- distalgo/compiler/mesgcomp.py: fix name bug for case of one free variable
Make Comm threads daemon threads.
Bump version to 0.6b.
Update version to 0.6c.

- mesgcomp.py: Fix sent/received: do not try to be clever and expand tuple for
    the case of 1 free variable. Originally, in order to support writing

      for c2 in received(Reply(_, c3))

    we expanded the tuple elements of the 'received' set, so that in this case
    it returns

      {c for (c, d) in self.received if d == c3}

    because of this, if the variable 'c' evaluates to boolean False (e.g.
    int(0)), then any code using 'received' in a boolean context will fail,
    such as:

      await(any(received(Mesg(_))))

    To fix this we make 'received' always return a set of tuples, regardless
    of the number of free variables it contains. However, since the
    auto-unwrapping of single free variable sent/received queries was
    marketed as a feature, to retain backwards compatibility we now auto wrap
    the target variable when used to iterate over sent/received queries
    containing single free variables. So

      for c2 in received(Reply(_, c3))

    would now be compiled into

      for (c2,) in received(Reply(_, c3))