The path in the module name has no longer the first path separator
replaced with an underscore (_), therefore relative import paths
between modules will no longer translate incorrectly when using just
a single sub-directory.
Improved the configuration options for generated module names: it is
now possible to specify the path prefix to strip and the prefix to
add.

Also updated grunt to ^0.0.74 (the module naming options mentioned
above are required by this upgrade).