replaced code contributor list with "git shortlog -s"
made contrib/bookmark-pinboard.sh executable
fixed LOG calls
fixed typo
removed "nada" (unused since SHA: 9065048bd0e20f29567cda21c94ca6f3e5d18783)
replaced NO_DEBUG with NDEBUG (which disable asserts)
implemented singleton pattern for the logger
getLogger() -> logger::getInstance()
use templates to convert something to a string
changed utils::to_s to utils::to_string<unsigned int> and utils::signed_to_s to utils::to_string<int>
Merge pull request #70 from gs93/minor_stuff

Minor stuff