Open URL or file in cell

[earthshrink]

Adds command gf to open URL or filename given in a cell. Invokes an included script scopen, so it can be customised by installation and overloaded in user's PATH. Command blocks on the script, so the script has the option to run a text mode browser like w3m or editor like vim in foreground, or return after launching a graphics mode browser like firefox or editor like gvim in background. Addresses issue #400.

Document file updated to also note exception to gab24 (Issue #399)

[andmarti1424]

May be with the 'G' in uppercase to not collide with 'g' command..

[earthshrink]

I like the 'G' idea. Maybe we should also fix gg and gl for the same reason, viz that they prevent goto to columns g and l, respectively.

[andmarti1424]

Actually yes! You're right.

[andmarti1424]

@earthshrink actually 'G' collides as well. 'gt' may be the better option for goto cell..
btw, why you removed the line
sstderr = newterm(NULL, stderr, stdin);
?

[andmarti1424]

'g' command of NORMAL_MODE changed to 'gt'"

[earthshrink]

Re stderr, something was breaking at the time but seems no longer the case after rebasing to freeze tip. I didn't change 'gf' since you fixed the goto to 'gt'. thanks.

[andmarti1424]

Will merge this soon, but doc file and Makefile seems outdated.

[andmarti1424]

Already merged! Had to make some changes regarding conf since that changed a little. Thank you @earthshrink

[earthshrink]

Thanks so much, Andrés! Apologize been unresponsive, been caught up in my research.