VERSION

0.7 - 11.02.2010: fix integer cutoff in simple numeric calculations.
    integer input like 3 / 4 (resulting in 0) is now converted to 3.0 / 4

0.6 - 03.02.2010: bracketing bugfix. Right parenthesis was set incorrectly.
    For example Al2(SO4)3 was evaluated as (Al*2 + (S + O*4))*3 and is now
    correctly evaluated as (Al*2 + (S + O*4)*3)

0.5 - 27.01.2010: Initial release