UPD removing all references to Plugin module depending on Mediator module
UPD adding test & code for adding collection of plugins where one is not Signature
ADD exception for plugin bootstrap not found
ADD & UPD new plugin exception and getting rid of SFDispatcher dependency in plugin module
DEL getting rid of erroneous exception files
ADD new exception if collection of invalid elements is attempted to be added
UPD changing Manager test & code to ensure specific exception is thrown
UPD adding more docs on implementation of Plugin module
UPD removing links from ChangeLog, cleaning up some things
UPD adding some more docs to CHANGELOG
Merge branch 'v0.1.0' into 0.2.0a-development
Merge branch '0.2.0a-development' into pluggable
UPD adding constants to have more explicit flag when passing to constructor
UPD 0.2.0 section to CHANGELOG and adding already commited changes
Merge branch '0.2.0a-development' into pluggable