Fixed typo
Removed non-existing links
Fixed links
Fixed wording
Fixed link
Minor edits
Various minor issues
Fixed code block
Fixed issues with tutorial
Fixed tutorials
Fixed another link
Fixed wording, code, links
Minor changes to hello world example
Added note about MacOS
Added warning about using multithreaded Apache handler
Added spinning donut tutorial
Finish SQLite tutorial for PHP
Fixed formatting
Added links
Added page on including C header files
Replaced occurrences of @cImport()