Atmospheric pressure unit conversion

A simple tool to be integrated in longer scripts which require pressure conversions

Convert pressure from Pascal to:
Atm: standard atmospheric pressure (unit: 101325 Pa or 101325 Nm^-2)
Bars: pressure above ambient or atmospheric pressure (100000 Nm^-2)
PSI: pound per square inch (1 lb/in^2 or 6894.757293168 Nm^-2)
At: Technical Atmosphere (98066.5 Pa or 98066.5 Nm^-2)
Torr: fluid pressure exerted by 1 millimeter of mercury
(133.322667519932 Nm^-2 or 133.322667519932 Pa)
Source: http://en.wikipedia.org/wiki/Pressure
and: http://en.wikipedia.org/wiki/Technical_atmosphere
Written: 10 Dec. 2012