add a password recovering feature in the login page. Send the password by email

[enrique]

#183 must be done before this

[jzarate]

r1200 first: a "change password" setting need to be done at the "configuration" module

[jzarate]

r1208 password request: email with activation link sent: new password displayed on screen when clicking the activation link.

[jzarate]

Replying to jzarate:

r1208 password request: email with activation link sent: new password displayed on screen when clicking the activation link.

TYPO: it's not r1208, it's r1206

[jzarate]

r1207 the process is now:

• user clicks on "forgot your password?" link.
• the system tells him to fill a text field with his username or email
• the user receives an email with an "activation link"
• once the user clicks on the "activation link", the system emails him again with a fresh password.

[jzarate]

r1210 added a missing file.

[jzarate]

r1218 major refactoring.

[jzarate]

r1223

• added the tests
• added new email testing methods to SiwappTestBrowser?
• "myConditionalValidator"--> "SiwappConditionalValidator?"