It doesn't seem easy to quote in xpath, so do a plain-old for-loop.

Closes: 425587@redmine

Closes: 428503@redmine

regression introduced when we fixed itering investments directly on
espaceclient webiste.

Closes: 437646@redmine

Sometimes the first balance page doesn't work, but another works.

Closes: 3027@zendesk

Closes: 3370@zendesk

Label is "COMPTE SUR LIVRET - Jeune"

Closes: 3280@zendesk

Json keys may differ depending on the loan type, so I have added conditions to better handle all cases
Closes: 434889@redmine

Closes: 434687@redmine

Closes: 435121@redmine

Closes: 3346@zendesk

keep the retrocompatibility
Closes: 428084@redmine

Closes: 3313@zendesk and 3277@zendesk

The '%' column was misunderstood in the previous state : we had a negative value for the portfolio_share
field.
This happened because this column is actually the diff_percent
Closes : 3209@zendesk

- Add an almost full client to retrieve informations from the
  `pea_wealth` subsite through its JSON API.
- Split pages.py in several files for maintenance purpose

A message on the website can be displayed saying that an operation is currently valuating.
Because of this some fields are shown as "*".
Closes: 432595@redmine

URL typing should be more reliable than label typing, since account
label is user-customizable and some dumbasses label their checking
account "carte"...

Also, fix history sorting, since anyway rdate is never set.

There were a confusion between the vars: unitprice, unitvalue, valuation, quantity

Deleted submit parameter in get_form() function, default = None