Added support to *.mcs file with "holes" (bitstream + user data).

Thanks to the Trenz Electronic Fpga User Alejandro for the recommendation.
Added support to *.mcs file with "holes".
For example if the *.mcs file has bitstream + user data.
Lines 2321 to 2331 are changed.
Version changes from 1.0.2 to 1.0.3 (line 550).