Revert "removed \Phalcon\Logger from incubator, all these exists built in in 1.2.4"

This reverts commit ec5d1bd9cd7707ceac28a1da73dfb08ce4c7d9fa.
removed Firephp fomatter and adapter since they are now part of phalcon extension (>= 1.2.4), updated README.md according to changes
added README.md
improved Dump component
readme update
\Phalcon\Debug\Dump::$output can be overriden now, updated README according to change
added phpunit to composer require-dev, created first test for \Phalcon\Debug\Dump
rewrote \Phalcon\Debug\Dump component to use less static methods, tests passing
updated README.md to reflect changes in \Phalcon\Debug\Dump
Merge branch 'feature/phalcon-debug-dump-tests' into develop