Make Readme prettier
Merge branch 'master' of https://github.com/moloch--/untwister into moloch

Conflicts:
	README.md
Clean up build error and compiler warning
    - It needed a #include <mutex.h>
    - One mismatched integer comparison
Fix linker issue, pthread was not linked at runtime
Fixed default number of threads to 2
    - Was labeled as 2 but actually was 4
Replaced printf with std::cout for more C++'ishness
Merge branch 'master' of https://github.com/moloch--/untwister into moloch

Conflicts:
	Makefile
	README.md
	untwister.cpp
Fix memory leak in SpawnThreads()
  - Forgot to delete "status" at the bottom of the function.
Minor formatting tweaks