Update README.md - pre-release notes

Additional notes for community standards.
Merge pull request #102 from hartsock/master

Update README.md - pre-release notes
Malformed Faults fail in non-informative ways

* Malformed Faults: introduces test for fault handler
* introduces ParserError which includes the malformed XML
* testing demonstrates ParserError includes malformed XML

closes: https://github.com/vmware/pyvmomi/issues/72
Update README.md - add email forum

Adds email forum to list of ways to contact the community.
Managed Entity doc bug

Demonstrates that pyVmomi acts slightly differently from other bindings to
vSphere. This test demonstrates that optional properties are always present so
that the test `hasattr(thisObj, 'parent')` need not ever be used.

closes https://github.com/vmware/pyvmomi/issues/104
Merge pull request #106 from hartsock/issues/104

Demonstrates proper use of Managed Entity parent attribute
Merge pull request #105 from hartsock/issue/72

Malformed XML fails in informative ways.
pyvmomi RST docs do not properly show lists

Fixes RST documents to include list mark up when appropriate.

closes: https://github.com/vmware/pyvmomi/issues/76
Merge pull request #107 from hartsock/issues/76

Fixes: pyvmomi RST docs do not properly show lists