add default savefig directory
replace tabs with spaces
explicitly missing key or empty str signals to use cwd
PEP8
Implement savefig.directory for tk gui
fix comment in gtk FileChooserDialog: does *not* remember last selected file/directory
Implement savefig.directory for gtk gui
Implement savefig.directory for gtk3 gui
Update CHANGELOG with savefig.directory feature
Split line
Update what's new with savefig.directory feature
Use unicode instead of str
Merge pull request #1685 from mspacek/savefig_directory

Add default savefig directory