Updated README.md.
Added merge.pe. Script to merge subset fontfile.

- It will always merge to Autonym.sfd and save.
- Will not produce Autonym.ttf.
Instruction for` 'merge.pe' added.
Updated README.md.

- Links added. Hope this will help rookies.
- Reformatting.
Merge pull request #42 from samyakbhuta/master

Script for merging. Updated README.md