remove warning for non installed features

[Jens-Uwe Grooß]

Currently in version 1.7.3 there is still the following warning when starting the program:

WARNING:root: NAppy is not available. You will not be able to read NASA Ames files.

Also, the user sees the de-activated menu entries Tools -> Trajectory Tool (Lagranto) Tools -> Time Series View (Trajectories)

This did irritate some users as they thought the program is not properly installed. I propose to deactivate these messages ans menu entries such that none of them are visible to the user. This should be done until these tools (interface to NASA Ames, trajectories) will be implemented.

[Reimar Bauer]

removing the warning makes it a 1.7.4 fix, or just moving it to the log file. Anything other has to be done on 1.8.0

But de-activate is the correct feature. This options just had to become described better in the documentation.

[Reimar Bauer]

missing nappy information added to logging.debug, fixes #359

→ <<cset f351aa131294>>

[Reimar Bauer]

Merged in ReimarBauer/mss/stable (pull request #573)

missing nappy information added to logging.debug, fixes #359

→ <<cset a72ee80aa55c>>

[Reimar Bauer]

issue #365

may be related, we need the original failure description