Added blank/empty value option
Added blank/empty value option
fix based on feedback
settled on replacementval for param name
Merge pull request #33 from monoblaine/master

Support for customizing input group buttons' text values
Merge pull request #34 from monoblaine/master

Update for the new configuration items "buttondown_txt" and "buttonup_tx...
Merge pull request #30 from pennstatephil/add-blank-value

Added blank/empty value option
added less port and easy initializer