Porting test to PHPUnit
Added coveralls, fixes
PHPCS start checking unit-tests, PSR2 fixes, fix example test for Zephir\Config
README with coverage dependecy latest stable and total downloads icons
Composer.json fixes

- Contributors ucfirst

- require gmp for dev and json for default

- added link for issues
Fix typo, add phpunit configuration, split bootstrap-autoloading into own file
Checking class-hinted parameters after check if the parameter is not null
Fixing variable name
Merge pull request #202 from zaets28rus/phpunit_codecoverage

Porting test to PHPUnit
Merge pull request #204 from nkt/fix_phpunit_tests

Fix phpunit tests
Fix tests command, add bugs section
Merge pull request #207 from nkt/patch-1

Fix tests command, add bugs section
Update CONTRIBUTING.md
Remove 'observed variable is a reference with refcount = 1' check

PDO (tested on PHP 5.5.4) returns objects which do have `isref`
flag set and `refcount` set to 1.
Fix typo in zephir_get_iterator
Fix zephir_hash_get() when in BP_VAR_(R)W mode
Implementing toString shortcut