Apex autobuild fails/hangs when trying to analyse a class from a managed package

[stevebuik]

The message is " from a managed package cannot be saved"

Also hangs the console when this occurs (because the console watches the tooling api via a websocket)

Solution: detect the lack of source for classes from managed packages and skip them i.e. use a predicate method for skipping classes.

Also add a try/catch block to better handle generic errors and report to user in progress component

[stevebuik]

managed classes now excluded