The calls to count line and images should now only be called when the
Credit screen is active. This should hopefully reduce the number of calls
overall.

Such as when there are fewer than 4 individuals shown, e.g. as a result of
a search/filter.

Counting handlers will now trigger for group members on the group
selecrion screen on page change or credits button.

Once again, if line/image counts for a character have already been loaded,
they will not be loaded again. However, because of the way the
loadGroupMemberMeta code is written, characters whose counts were loaded
on the individual select screen are different from those on the group
selection screen, so browsing groups for the first time this session WILL
cause the behaviour.xml file to be fetched.

TL;DR: Group Select screen Misty and Individual Select screen Misty are
are two different players, so the Misty behaviour.file is fetched twice.
The way group members are loaded would have to be rewritten to reduce the
number of calls further.

The call to behaviour.xml to compute unique line counts is now triggered
for characters currently on the selection screen in the following situations:

(1) That character's line or image count is not already loaded, AND
(2) The user presses the Credits button, OR
    the user changes pages
On first run, this will increase the number of calls to characters'
behaviour files by four, but it should not be needed upon subsequent
loads. Ideally the calls should not be made unless the Credits screen is
displayed, so that might be an avenue worth exploring.

This commit also introduces JS Promises into the code, which are cleaner
than chaining AJAX success callbacks. However, they are newer, so they may
or may not impact older or mobile browsers (MDN suggests they are at least
supported by most). Should they cause problems, either they will need to
be rewritten, or more preferably, be substituted with a polyfill.

For now, the function simply outputs the number of unique dialogue lines
to the console rather than displaying on screen.

It seems to match the output of the XML unique line counter tool for most
characters but a small handful of them seem to have a 1-2 line
discrepancy.

636 unique lines, no broken images

Zone tan typo

See merge request !97

Some minor Arwen fixes

See merge request !95

Update zone-tan.txt. Her .xml file is already fixed.

See merge request !92

Zone-tan and Arwen very recently added

Zone tan korra targeted line fix

See merge request !93

Credit: yu_ser

Deal cards at a constant speed

See merge request !77

Credit: Patrickisdom

Feature: Line counter tool updates

See merge request !88

Zone tan update

See merge request !90

- The previous commit put these in the /sp/opponents/ folder instead of
just /sp/
- Most mages might be identical, but all are included in the commit just
in case
- Renamed text documents to original names only so that we can see the
line-by-line diff
- Grouped targeted lines together in dialogue document, as these are a
pain to locate and paste in one by one
- Some targeted Ruby lines had double case tags, so the latter was
overriding the former. These are now all multiple state tags within a
single case.

Weiss - Big Art & Dialogue Update

See merge request !89