Squashed 'lib/SimsalaPhp/' changes from aa5c42a..6d9bedf

6d9bedf Fixed navigation generation

git-subtree-dir: lib/SimsalaPhp
git-subtree-split: 6d9bedf5380f723308cb4c3157a88f26955b56fa
Merge commit 'b430737d08a940e0348c911e6a20100d3ea49764'