[Exception] Created an Exception interface
[Exception] Refactored existing exceptions and deprecated old ones
[Exception] Put the new exceptions in use
[Exception] Introduced new exceptions to replace those from sf2 or stl
[Exception] Aliased DifferentLineBreaksFoundException
[Exception] Mark deprecation since 1.4
[Exception] Moved code from deprecated parent to new ones
[Exception] Made tests use new classes
[Exception] Updated doc
Fixed typo
[Exception] Converted Editor#run()
[Exception] CS and phpdoc fixed

Conflicts:
	src/Gnugat/Redaktilo/Exception/CommandNotFoundException.php
	src/Gnugat/Redaktilo/Exception/PatternNotFoundException.php
[Exception] fix IOException#getPath not available in SF2.3
[Exception] add todo and missing deprecated phpdoc
[Exception] Remove references to Symfony in doc
Merge pull request #91 from pyrech/exception

Exception refactoring