Group helper functions
Restore _ to helper.text_ function name
Group cell functions
Group table functions
Group index functions and move table index functions to tableOps
Group UI functions
Group selection functions
Move updateCellEdge_ and setCellValue_ into tableOps
Fix clear selection button call to clearSelection
Move sig* functions into selOps
Group export functions
Group event functions
Re-wordwrap license
Bump version to 0.4.0