add more TODO

1) going to rename <shared> to <default> section
2) <shared> will get another meaning
3) clarify merge procedure
getting rid of camelStyle symbols
changed <shared> to <default>

<default> means configuration that is merged to all application and
instance configuration 'by default'
Later <shared> section will be introduced - this will allow to
explicetly merge elements from <shared> to application or instance
configuration
naive config source format

Implemented 'naive' input format primerily for command line
configuration. For example:
./my_app --config "attr1=value:attr2=value2:section.attr3=value3"
code review cleaning
continue development

1) change xcode projects to fully support c++11
2) add application library