* Dependencies:

- Added new dependency on libesmtp.

* Event actions:

- Added ability to send E-Mails alerts when a event occure.

* GUI:

- Fixed a bug on spies selection.
- Worked on spies selection smart interaction between panel and main tree view.

* Spy options:

- Added possibility of insensitive/sensitive search for web page spies.
- Added possibility to specify HTML section for content search (the whole page, HTML, HEAD, TITLE, META and so on) for web page spies.