More updates & bug fixes

Updates

• Added option to use Base To Hit Bonus (BTHB) from OSRIC, instead of the to hit tables. This works for descending, or ascending armor class. As with other options, accessible via checkbox on "Character Options/Assumptions" tab.

Bug Fixes

• Added ability score minimums to all classes (e.g. only Fighters can have an Intelligence of 5 or less, if you have two ability scores lower than 6 then you are not eligible for any class, etc. etc.)
• Fixed Constitution bonus for Halflings when Option box checked to add +1 to CON for halflings
• Fixed that human Rangers were not able to dual-class into Thief

• Fixed Elves & Halflings not being able to choose Fighter/Thief multi-class combo.

NOTE: The Hireling sheet is still in work (read is not yet ready, so is a placeholder).