Support stripping part of the path when sftping

Adds support for stripping part of the path when performing sftp
operations by specifying an optional srcBasePath config option.
Make sure we only match at start of path
Merge pull request #4 from marcins/feature-srcbasepath

Add "srcBasePath" feature to allow manipulating path when copying
update release history; bump version
update description
update description
Merge branch 'master' of git://github.com/andrewrjones/grunt-ssh