#19 Should be able to specify paths relative to CWD with -out sw

[Mark Olleson]

The OSFPT currently fails with an 'The given path's format is not supported error' when attempting to specify a relative path and using the -s switch.

When not using the -s switch the tool doesn't throw an error, but creates packages in the the name {xxxx-xxxx-xxxxxxxxx.....}.osf where the xxx part is a random GUID.

Many users would expect to be able to use relative paths, and in fact, using fully qualified paths is very inconvenient when scripting the tool any portable scripting language, or from any tool built on top of Cygwin - such as some versions of Python, Perl, Bash etc.