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. Arguemtns for the binary (which you can also get by calling main with a ```-help``` argument)

```-path <path to file>: obvious
-print: print solution```