Revert "Merge pull request #79 from alquerci/issue/75"

This reverts commit 68f664520ee32b222056a2360156d83d14145fd8, reversing
changes made to de47cb6248c817ce1c0e19eee8afffeb9826b9d3.

Conflicts:

	src/Decoda/Hook/EmoticonHook.php
	tests/Decoda/Hook/EmoticonHookTest.php
Refractored tests for `EmoticonHook` class

The complete process parsing is now executed.
Added test for emotions detection inside of bbcode element

The emoticons should be detected inside and outside of a bbcode element while leaving the tags unbroken.
Added event hook `filterPlaintext` to intercept a BBcode element's content

Allows you to edit only the elements content while leaving untouched all tags.

For the next major version don't forget to add `filterPlaintext` method to the `Decoda\Hook` interface.
Fixed emotions detection inside of a bbcode element

Execute emoticon detection on `filterPlaintext` event instead of `beforeParse`.

There is a limitation when a tag does not exists on the parser, therefore an emoticon glued to it can not be detected.

Performances are probably reduced because it execute a regex for each elements content.
Merge pull request #82 from alquerci/emoticon/fix/tag_delimiter

Fixed emoticons detection inside of a bbcode element