Fixed build instructions
Fixed build instructions

The find_package command does not (and has never) accept relative paths,
so add a little bash code that most can expand out or use directly.

thewtex/tomviz,OpenChemistry/tomviz,OpenChemistry/tomviz,cjh1/tomviz,mathturtle/tomviz,thewtex/tomviz,mathturtle/tomviz,OpenChemistry/tomviz,cryos/tomviz,cjh1/tomviz,OpenChemistry/tomviz,cjh1/tomviz,cryos/tomviz,cryos/tomviz,mathturtle/tomviz,thewtex/tomviz