Dealing with single class on source control

[lscheffler]

FoxBin2PRg allows to deal with single classes. This means it creates a text file per class.
If this is detected (issue #81), the right click dialog for classes should allow commit / reset / diff .

[DougHennig]

Notes from Fernando:

• The syntax for importing or exporting a single class is:
  classlib.vcx::classname::import
  classlib.vcx::classname::export

• For importing just one class in particular you need to specify a real class file, in example, "FB2P_TEST.CL_FORM.VC2", which in addition to the "RedirectClassType: 1" online CFG object setting, does import/replace it alone without touching the rest.