Redirect all (i.e. non-Python) application output to log file

[remram44]

Right now, all output from Python code, on sys.stdout/sys.stderr, is redirected to the log file.

Some people seem to be now arguing in favor of redirecting at the OS-level, so that no output would ever reach the terminal.

Pros:

• No output in terminal
• If some of that output is important, it would be in the log that would be submitted on error (I don't think any of it is important)

Cons:

• Ugly non-portable system hack
• Not Python
• Unexpected madness; the system prints diagnostics messages related to UI toolkits, we shouldn't be messing with that
• Clogging the logfile: these messages are often warnings from the UI toolkit or Qt, about mismatching fonts and compatiblity modes, which are completely useless to diagnose application-level errors
• This is not what anybody does. Run any random Linux application from a terminal, you will see tons of warnings; why is this more of a problem to us than anybody else?
• Warning/debug output from UV-CDAT components should be logged the right way. Leftover debug code should be dealt with, and will be annoying when running scripts with no recourse
• Again, ugly non-Python system hack

For the record, I am also highly opposed to redirecting sys.stdout/sys.stderr in the first place (just use Python's convenient logging facilities).