Squashed 'lib/SimsalaPhp/' changes from 6d9bedf..6a27a25

6a27a25 Automatically rename first file to index.html

git-subtree-dir: lib/SimsalaPhp
git-subtree-split: 6a27a257e8204c457694870968914e9f8be78480
Merge commit '3c97b651f0a9953365a4c50eb1d82e30d678c2ab'
Added description of symbols and methods