Edit side projects page

Use maintainers instead of BFDL

You asked for nitpicking, so here I go :). BFDL should only be used for
large projects that have been around for a while and have an established
leader who no one could every see changing. The side projects are likely
to have their maintainers change and are not so large as to warrant
calling anyone a BFDL.

Update welcome.md

You took some wiki content so I am taking some credit: :-P

Add languages to relevant fenced code blocks

Grammar, spelling, punctuation, and typo fixes

See http://azerupi.github.io/mdBook/format/theme/syntax-highlighting.html

Grammar stuff

small grammar fix

typo fix

small grammar fixes

grammar fixes

typo fix

make title match