added findDTM overload

findDTM accepts a box as a parameter.
added tbox.dtmExists to types.simba
Merge pull request #20 from Ollybest/patch-5

added findDTM overload
Merge pull request #21 from Ollybest/patch-6

added tbox.dtmExists to types.simba
chooseOption mouseaction is now optional.
Merge pull request #22 from Ollybest/patch-7

chooseOption mouseaction is now optional.
TTabLogout -> TRSTabLogout; converted mainscreen.simba to utilize TRSInterface
Merge branch 'master' of https://github.com/SRL/SRL-6