ProfilePage: Don't reset lists_page_inited in on_leave

So we don't ever show the lists of a user twice
new-lists-entry: Also create the list on the entry's activate
ListStatusesPage: Load newer tweets on_join

... if the new list_id is the same as the current list_id.
New Icons
user-lists-widget: Change 'your lists' to 'created'

Because it is constistent with the 'subscribed to' label *and* does not
say anything about the user whose lists we display.
Lists: Increase the member count if the user adds a member
Lists: Decrease the member count on member removal
ListStatusesPage: Set the values even if new_id == old_id
Readme: add Ctrl+Shift+s shortcut
ListStatusesPage: Fall back to load_newest if max_id == 0

This was for example the case when a new user was added to an empty
list, then the ListStatusesPage was joined, but nothing was loaded
although the list now contained tweets.
ProfilePage: Refactoring
HomeTimeline: Refactoring
HomeTimeline: Show long urls in notifications

See #77.
list-statuses-page: Add some margin-left to the refresh button
UserListsWidget: Enable the NewListEntry if the new list call failed
Add Alt+5 shortcut

so you can switch to the search page again.
Merge branch 'master' of https://github.com/baedert/corebird
HomeTimline: Don't show notification if it's the user's tweet

Woops. Closes #78
tweet-list-entry: some buttons can't have an accessible child objects
otherwise the app will crash with a segmentation faoult. This needs to
be researched.
Merge branch 'master' of https://github.com/baedert/corebird