Improve some code without any fonctionality change
Correct inconsistency when alternate between one date/time and
multi-date/time files
Minor code improvement
Add possibility to request e-mails including altitude data (300,500,700,850 hPa)
- putt all request code in separate files
- add altitude parameters selection
- modify dialog to suppress pop up for moving data typing
Correct Altitude Ctrl and data display
Clear code
Correct a typing error
Correct display for Linux
Add GribRequestDialog.cpp into POTFILES.in and correct strings
Merge pull request #105 from Ptizef/master

Add Altitude data request ( 300,500,700,850 hPa ) and some minor code improvements