improve some of the wording in the readme

The project is maintained by more than one person, so replace "I" with
"we", etc.

Link to the places that we want users to report problems or send pull
requests.

Signed-off-by: Doug Hellmann <doug@doughellmann.com>

Author: dhellmann

README.txt

@@ -52,13 +52,16 @@ Supported Shells
 ================
 
 virtualenvwrapper is a set of shell *functions* defined in Bourne
-shell compatible syntax.  It is tested under ``bash``, ``ksh``, and ``zsh``.
-It may work with other shells, so if you find that it does work with a
-shell not listed here please let me know.  If you can modify it to
-work with another shell, without completely rewriting it, send a pull
-request through the bitbucket project page.  If you write a clone to
-work with an incompatible shell, let me know and I will link to it
-from this page.
+shell compatible syntax.  It is tested under ``bash``, ``ksh``, and
+``zsh``.  It may work with other shells, so if you find that it does
+work with a shell not listed here please let us know by opening a
+`ticket on bitbucket
+<https://bitbucket.org/virtualenvwrapper/virtualenvwrapper/issues>`_.
+If you can modify it to work with another shell, without completely
+rewriting it, send a pull request through the `bitbucket project page
+<https://bitbucket.org/virtualenvwrapper/virtualenvwrapper/>`_.  If
+you write a clone to work with an incompatible shell, let us know and
+we will link to it from this page.
 
 Python Versions
 ===============