Merge pull request stepcode#303 from stepcode/review/inverse-attributes

inverse attributes...finally!

STEPcode v0.7

Update text files for v0.6

Add v0.6 info, and change urls in those files

Merge pull request stepcode#146 from mpictor/ver-0.5

Release v0.5 - update INSTALL, NEWS, README

update NEWS and README for v0.4

v0.3 release

update README, NEWS for v0.2

Update text files for v0.1 release - ChangeLog, INSTALL, NEWS, README…

…, TODO