4 new commits pushed to

<https://github.com/RTimothyEdwards/open_pdks/tree/master|master>

by RTimothyEdwards

<https://github.com/RTimothyEdwards/open_pdks/commit/6595793b008fbc800b191fe297f74bfaff5ba04b|6595793b>

- Remove WIRE_RC_LAYER

<https://github.com/RTimothyEdwards/open_pdks/commit/8cc619f865de6af381673b5920d245aed05f39b8|8cc619f8>

- Updated version to go along with the merge of pull request #392

<https://github.com/RTimothyEdwards/open_pdks/commit/8fcd1332bed366d6275c41e8f580d628fd656a36|8fcd1332>

- Updated the README file for sky130 and the top-level README.md file

<https://github.com/RTimothyEdwards/open_pdks/commit/767b48301736f1b84b7b7cf85a606f692974a929|767b4830>

- Modified the definition of realpath() so that it does not generate RTimothyEdwards/open_pdks