Finished first draft of ReRAM support for Sky130.  This completes
the modifications started with yesterday's commit, which split the
ReRAM-enabled process to PDK name sky130B.  Today's commit handles
the differences between PDK variants A and B, which are namely
(1) The technology LEF files (parasitic capacitance values for metals
from metal2 and up changed), and (2) The magic tech file (parasitic
capacitance values changed, and layer heights changed).
diff --git a/docs.txt b/docs.txt
index 0b1345f..60fa77f 100644
--- a/docs.txt
+++ b/docs.txt
@@ -3,7 +3,7 @@
 
 ----------------------------------------------------------------------------------
 
-Written by Tim Edwards 2019 - 2021 for efabless (efabless.com)
+Written by Tim Edwards 2019 - 2022 for efabless (efabless.com)
 and Open Circuit Design (opencircuitdesign.com)
 
 URL: http://opencircuitdesign.com/open_pdks