Adding improved baud rate calculation, including use (or not) of the U2X bit.  (Code from gabebear).
Adding improved baud rate calculation, including use (or not) of the U2X bit.  (Code from gabebear).



Former-commit-id: 3f7488801860665ff3434c7fd771d1ec6c217214

majenkotech/chipKIT-core,EmbeddedMan/chipKIT-core,chipKIT32/chipkit-core,pontech/chipKIT-core,pontech/chipKIT-core,chipKIT32/chipkit-core,chipKIT32/chipkit-core,EmbeddedMan/chipKIT-core,adamwolf/chipKIT-core,majenkotech/chipKIT-core,ricklon/chipKIT-core,ricklon/chipKIT-core,EmbeddedMan/chipKIT-core,adamwolf/chipKIT-core,majenkotech/chipKIT-core,EmbeddedMan/chipKIT-core,UECIDE/chipKIT-core,adamwolf/chipKIT-core,ricklon/chipKIT-core,EmbeddedMan/chipKIT-core,pontech/chipKIT-core,pontech/chipKIT-core,EmbeddedMan/chipKIT-core,adamwolf/chipKIT-core,EmbeddedMan/chipKIT-core,majenkotech/chipKIT-core,UECIDE/chipKIT-core,majenkotech/chipKIT-core,UECIDE/chipKIT-core,UECIDE/chipKIT-core,UECIDE/chipKIT-core,adamwolf/chipKIT-core,majenkotech/chipKIT-core,adamwolf/chipKIT-core,pontech/chipKIT-core,chipKIT32/chipkit-core,ricklon/chipKIT-core,ricklon/chipKIT-core,adamwolf/chipKIT-core,pontech/chipKIT-core,chipKIT32/chipkit-core,majenkotech/chipKIT-core,pontech/chipKIT-core,ricklon/chipKIT-core