Change indent with space shortcut

[andreikop]

I was about to change the shortcut, but found, that Shift+Backspace is used to Unindent by 1 space.
Current map:

• Shift+Space - indent with 1 space
• Shift+Backspace - Unindent with 1 space
• Ctrl+Backspace - Delete word back.

If we use Ctrl+Shift to indent, the keyboard map would be inconsistent.

@bjones1

[bjones1]

How about:

• ctrl+shift+space: indent 1 space
• ctrl+shift+backspace: unindent 1 space
• Ctrl+backspace: delete 1 word back

That is, use ctrl+shift instead of shift+ as the indent/unindent modifiers?

I updated the keyboard map at https://docs.google.com/spreadsheets/d/1GftvSaUP4e9e8YYTL0CtFe_LhxL9_XMW9VA2c5F0RjI/edit#gid=0 with the Ctrl+Backspace and the Ctrl+Delete shortcuts -- they weren't there before.

[andreikop]

I'm really busy this week. And @SergeySatskiy is waiting for release.
Help is welcome.

[bjones1]

Ready to go -- see #67. Do you want me to post this on PyPI as v 3.1, or do you want to bump the version number first?