Bugfix: ensure to compare strings

Don't forget that any parameters retrieved via URL patterns are strings,
and comparisons need to take that into account.
Docs: updated changelog
Update command docs
Set microseconds to zero in file modified time
Fix paragraph-level markup
Don't change an user score when old actions are processed

fix #247
Log used memory stats

Fix #237
Add more memory info (unreachable heap size and real memory size)