Added new subcommands `gef set` and `gef run` (alias g) to wrap the set/run gdb commands to allow convenience variables to be interpreted
Added new subcommands `gef set` and `gef run` (alias g) to wrap the set/run gdb commands to allow convenience variables to be interpreted

A classic use would be
```
gef> pattern create 128
[...]
[+] Saved as '$_gef0'
```
Now we can do
```
gef> g $_gef0 blah blah
```
And gef will expand `$_gef0` for you (see issue #64)

hugsy/gef,wmliang/gef,wmliang/gef,hugsy/gef,hugsy/gef