Motivate of the pull request

This enables users to create a sample OpenFPGA project quickly.

Describe the technical details

What is currently done? (Provide issue link if applicable)

What does this pull request change?

I added a create_task shortcut in openfpga.sh file
This shortcut copies one of the template tasks defined in the openfpga_flow to the current directory.
There are two template projects created for now, vpr_blif and yosys_vpr,
these projects are portable and contain all the required files in the task directory

source openfpga.sh 
create_task _my_openfpga_task  # This will create  a example task default is yosys_vpr

Which part of the code base require a change

• VPR
• Tileable routing architecture generator
• OpenFPGA libraries
• FPGA-Verilog
• FPGA-Bitstream
• FPGA-SDC
• FPGA-SPICE
• Flow scripts
• Architecture library
• Cell library
• Documentation
• Regression tests
• Continous Integration (CI) scripts

Impact of the pull request

• Require a change on Quality of Results (QoR)
• Break back-compatibility. If so, please list who may be influenced.