Store Version Conflicts When Creating Unitizers with Dev version of Unitizer

[brodieG]

In particular, it messes up the check process on travis etal. that may be referencing the production version of the package that may not allow itself to load dev unitizer stores:

|                                                                               
| The following unitizer could not be loaded:
| - unitizer/cstringr.unitizer: Cannot load a unitizer store of version greater 
|   (1.4.2.9000) than of installed unitizer package (1.3.0)