Supports V1 and V3 Mailjet's users

Supports V1 and V3 Mailjet's users, the version of the plugin is changed
to 3.1.0 because this change is major
Update the README file and directory name correction

Update the README file with the latest Tested up to WP version; Wrong
directory name;
Fixing bug issues #1369 and #1373

Fixing bug issues #1369 and #1373; In summary: The list of contacts for
the widget page was not listed; The navigation bar in the iframes must
behidden;
Add Use Tracking to WordPress plugins

For each IFrame used in the WordPress plugin (Contacts, Stats,
Campaigns), add a "u" parameter in the URL that contains the plugin name
and the plugin version. In our case : "&u=WordPress-3.1"
Change log changes

The change log was filled with information about the changes related to
commit number: 80307cde3afe6bb76555ac585fc89031524b0bc2 and redmine
issue #1420 titled "Add Use Tracking to WordPress plugins".
Tag changed in the change log

Tag changed in the change log
Change log changes

The change log was filled with information about the changes related to
commit number: 80307cd and redmine issue #1420 titled "Add Use Tracking
to WordPress plugins". This information was added to change 3.1.0
Add a new parameter to disable features, issue #1437

In our WordPress case, we will add "&f=amc" to Contacts, Stats and
Campaigns IFrames URL to disable some features. This change is related
to issue #1437.
Set IsActive to be TRUE for newly generated TOKEN

Every time when we generate a new TOKEN we set the parameter IsActive to
be TRUE (Related to redmine issue #1488)
Merging branches

Merging branch "pavel" (version: 3.1.0) with master's branch (version:
3.0.3).