Bug in memory requirements parsing

[stlaz]

When specifying memory requirements for a recipe, these are parsed incorrectly when there's a missing space in between the operator and the requirement.

Example:
Memory: >2000

is represented in the xml as:
<memory op="&gt;2000" value=""/>
rather than
<memory op="&gt;" value="2000"/>

[Pajinek]

It is used method split(). String has to contain white space before number "> 2000" as you wrote. It should be clever. I agree. I try to find better solution.