Allowing for spaces and a typo

Allows spaces in directory structure, also fixes a quick typo regarding
the Installer bat file name.

Problem 1:
If you call `neo4j.bat install` the error message you get asks you to use `Neo4j-Installer.bat` but that doesn't exist. 

Problem 2:
If you have the standalone codebase in a folder with spaces (`d:\Neo4j Database`) you receive an error message (`Error: Unable to access jarfile d:\Neo4j`)