Release Name: 2.3

Notes:
 * 'clear' (flush stack) has been added.
 * You can add comments to scripts now.
 * Issues with parsing strings have been solved.


Changes:
 * 'clear' function has been added that allows to flush stack
 * Parsing of strings has been corrected.
 * Usage examples for interactive and script mode have been added.
 * In scripts and interactive input anything following a semicolon is ignored (does not apply to semicolons inside a string).
 * Support for escape sequences in scripts and interactive input.