Add new brewspec and fix wrong python package name

* New brewspec, that gives ability to build latest stable
  (for latest master you need to pass '--devel' flag)
* All dependencies are inside this spec
* We can now test Tarantool (you need to pass '--with-tests'
  flag to 'brew')
* We can build Tarantool with -DCMAKE_BUILD_TYPE=Debug (default is
  'Release')
* Fix for name of pypi module - ('python-daemon', not 'daemon')
* Fix README for MacOSX