added docs, tidied up output

README.md

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+WordBubbles Solver
+==================
+
+This is a brute-force-ish solver for games such as [Boggle](http://www.amazon.co.uk/Hasbro-Boggle/dp/B016I77JSO), [Ruzzle](http://ruzzle-game.com/) or [WordBubbles](https://itunes.apple.com/us/app/wordbubbles!/id922488002?mt=8) which require the player to traverse a grid of letters to form words without visiting the same letter twice.
+
+Pre-requisites
+--------------
+
+ 1. You will need a word list of some sort! Any list of words will do and some Linux distributions provide one by default (check somewhere like `/usr/share/dict/words`).
+ 1. A modern Java
+
+Building
+--------
+
+Building ought to be nice and simple:
+
+```
+$ javac main.java
+```
+
+This should build all the relevant files in the project...
+
+Running
+-------
+
+First create a text file with the grid and save it as, for example, `grid.txt`. If you need to include blanks then use a `space` character. You can, optionally, include a line starting with a # which has a list of word lengths to look for. For example:
+
+```
+# 6 7
+tz p
+deak
+mssm
+ apt
+```
+
+Then invoke the solver:
+
+```
+$ java main /path/to/wordlist <grid.txt
+```
+
+This should output a list of words :-)