Add readme, rendering profiles to file

Added first version of readme.
Added helper method which saves profiler output as html file
it is usefull when you want to profile cli scripts.
switched to empty template
Update magento-composer-installer dependency to "*"
Merge pull request #7 from vinai-drive-by-commits/master

Update composer.json
Added option to enable/disable logging of invalid nesting.
Merge pull request #8 from LimeSoda/optional-logging

Add option to enable/disable logging of invalid nesting.