Portability part 1 - C99 printf

printf, sprintf, fprintf etc are now all C99 compliant. All except sprintf, which is now signaled as deprecated. This raises a few warnings about sprintf usage in the build. Some I fix with pull requests that will follow. Some others should be fixed by the respective authors.
Pre-existing: "Over the past year" is a bad phrase to use.  "During 2013" or "During 2013 and early 2014" won't go out of date in the same way ...