Don't freeze if path doesn't exist

[AndyBitz]

This closes #131.

yield pathType.dir(current) and pathType.dirSync(current) just return on SIGINT .
fs.existsSync should be more reliable.

[floatdrop]

@AndyBitz path-type also used in lib/render.js and lib/server.js. Should it be replaced there too (and removed from package.json)?

[AndyBitz]

@floatdrop I tried to change it there too. It didn't work as expected.
Also I figured that fs.existsSync doesn't check if it is a directory or not, so I changed it to lstatSync .

[leo]

Thanks a lot! 😏