Version 0.3.1

This is an improvement of version 0.3.1, with several fixes and secondary improvements:

Changes:

• Allows output directories to be created by fidolasen_s2 (#54)
• Convert NA arguments to NULL
• Add check that the mask polygons are not empty
• Add parameter extent_name (#58)
• Add exception for Hub unavailable
• Add support for multiple tiles and extent names
• Allow to generate thumbnails also on maps with wrong naming convention …
• Allow to generate thumbnails also on maps with wrong naming convention …
• Add "tiles" argument to consider only specified tiles
• Add the possibility to download products over Windows (#49)
• Add extent_name in the GUI (#58)
• Add automatic installation of wget on Windows
• Add support for TCI thumbnail

Some fixes:

• Fix recognising gdalUtils after R restarts
• Fix error applying sen2cor on oldname SAFE
• Delete also L1C product when applying sen2cor on a copy of the SAFE
• Fix to recognise all SAFE paths
• Do not ask for overwriting dependences in non interactive mode
• Fix the check on dstnodata length
• Fix the number of polygons required to mask
• Combine multiple features in mask / extent
• Accept non-sf extents or sf with NAs within fields
• Change TCI mask values (use 0 instead of NA in order not to create problems with 8-bit format)
• Various fixes (see solved issues)