1.0.2

This is a minor release that fixes several bugs:

• GeneratorsOfEndomorphismMonoid sometimes incorrectly stored its result. This was reported by Chris Jefferson in Issue #251 and fixed by James D. Mitchell in PR #265.
• Some warnings that occurred when compiling against GAP 4.9 were removed. The warnings were reported by James D. Mitchell in Issue #266 and fixed by Wilf A. Wilson in PR #274.
• There was a bug with the ViewString of known non-complete digraphs, where such digraphs were described as being complete. This was reported by Murray Whyte in Issue #272 and fixed by Wilf A. Wilson in PR #273.