Update linkscape.js

Full path with the hostname was causing it to fail with a status: 403, error: Unrecognized API method: 'No api method found.' Note that parameter names are case-sensitive. For more information on available calls, see: http://apiwiki.moz.com/categories/api-reference"

Original code: var path = 'http://' + this.options.hostname + '/' + this.options.path + '/' + apiPath;

Modified it to include only the path, leaving out the hostname

Hey I am new to this, sorry if I have messed up something
Merge branch 'patch-1' of https://github.com/vineeteldochan/node-linkscape