Can't run idetools support on mac
The `Tools->Compile current file` command works on mac (with the default `$findExe(nimrod) c $#`), but trying to jump to a definition or use suggestions sends the following output to the console:

```
Populating suggest.
Saving /tmp/aporia/suggest/aporia.nim
 idetools --path:/tmp/ --path:/Users/gradha/project/nimrod/Aporia --track:/tmp/aporia/suggest/aporia.nim,69,6 --suggest /tmp/aporia/suggest/aporia.nim
sh: idetools: command not found

[Warning] No items found for suggest
```

This suggests the idetools command is not using the same binary finding mechanism as the compile command and there is no other configuration option to specify directly the path to the nimrod binary for idetools support.

Also, better command result detection would be nice, because the user doesn't see anything wrong unless checking the console output. There is no UI level alert that something wrong went running the external command.
