#59 PWM name collission

[Tieske]

Not sure how python handles this (maybe automatic?), but I ran into it while adding it to my Lua binding;

The function GPIO.PWM(pin, freq) has a naming conflict with the new constant return value for GPIO.function(pin), which could be GPIO.PWM.

In my case the function PWM was overwritten by the constant, hence inaccessible.

[Tieske]

fwiw; I renamed the function PWM to 'newPWM' as it returns a new instance.

[Ben Croston]

Fix will be in release 0.5.5

[Ben Croston]

Added constant HARD_PWM for gpio_function()
In release 0.5.5 - issue closed