Progress bar & DOB date selection + more

Further updates:
1) Basic progress bar implemented w/ simple example commented
2) Child window position and size revised (please test on your systems/diff resolutions!)
3) Focus placed on child windows on-click now (cursor goes to first field automatically)
4) Date selection button added to Create Account window

I may be leaving some stuff out... I don't sleep ;)
Merge pull request #12 from hyperstrike/patch-6

Progress bar & DOB date selection + more