adding a (customizable) option to use relative paths with projectile-find-file
simplifying projectile-hashify-files to just a funcall
adding a unit test for relative file paths
fixing the projectile-test-hashify-relative test
adding a unit test for projectile-hashify-with-uniquify
adding subheadings to the README
documenting proejctile-show-paths-function in the README
Merge pull request #65 from Wilfred/master

adding a (customizable) option to use relative paths with projectile-find-file