0.59

• Add description of -help switch to help message itself

0.57

• Add -pfirst global switch to make required parameter appears before switches
• Add -errormsg element switch that provides ability to add custom error messages together with -validate element switch

0.55

• Add ability to provide multiple aliases for single switch
• Add additional check for collision between name of the switch and alias of any other elements

0.54

• Add -help option for interactive help generation

0.52 version

• Add -type element switch for checking against types (classes) defined in [string is] command
• Add -allow element switch, inverse of -require element switch