v5.3.0

• iterate directories snippet added.
• archive compress .zip snippet added.
• archive decompress .zip snippet added.
• system uptime seconds snippet added. Seconds can be formatted by fn time format seconds snippet.
• remove old/new files/directories snippet for removing files (-type f) or directories (-type d) if they are older (-mtime n) than n days or newer (+mtime n) than n days.
• Comparison of floating point numbers: float|double >, float|double >=, float|double <, float|double <=, float|double ==, float|double != added.