add config parser and cover it by unit tests
final .xml parser
add example of extended config class and cover it by unit test, update components, update config test
update Config class and tests
refactor Config class
start working on Strategy class
update Strategy class and StrategyTest, add support for sha256 and sha512
refactor Config class, update Strategy
update strategy, add extended strategy example, update composer
complete builder and add builder test
Merge pull request #3 from kamilsk/2.0

alpha release