Fix for non-working rake tasks

This fixes `private method `load' called for nil:NilClass` errors.

Idea from https://github.com/teohm/capistrano-shared_file/pull/2.
Version bump to 1.1.1
Regenerate gemspec for version 1.1.1
Merge pull request #4 from opyh/master

Fix non-working rake tasks after installation