[Geany] Improve project support

[Michal Kurgan]

Hello!

Another useful idea for me.

Currently in geany Compile, Build and Execute commands are associated with
file types and have two nice, additional variables (%f and %e). It would
be very useful to add one more variable that would stand as project base
directory (i.e. %p).

This could bring problems in case when project is not open. To resolve that
it could be interesting to add certain project properties: compile, build and
run that would overwrite default ones. Currently there is a similar
"override" run option, but it does not provide %f, %e and possibly %p
variables.

I would be very happy if you could add compile and build project options,
providing also project base directory variable (i.e. %p).

Thanks in advance for answers.

-- 
Michal Kurgan