main executable

Now using ```github.com/paddie/godoku``` import for file.

To build, cd to ```main```directory and run:
```
go get
```

To retrieve all dependencies and install them into the $GOPATH, and then run:

```go build``` in the same direcotry and you should have the binary. Arguments for the binary (which you can also get by calling main with a ```-help``` argument):

```
-path <path to file>: obvious
-print: print solution
```