Add fixes for AR1 prepared by Audrey, converted to CSV
Replace empty author_id with NULL, add missing Modifications 0 (x2)
Merge branch 'master' into ar1_fix
Merge branch 'master' into ar1_fix
Fix AR1 participations (part I): 95 deleted, 91 inserted

This is the semi-automatic part of the update based on fixes
suggested by Audrey Baneyx.
Fix AR1 participations (part II): added 12 participations

I also added 1 author, and updated 1 author (middle name moved
from last name to first name).

This is the last part of fixes suggested by Audrey Baneyx for AR1,
including informed guesses to match authors and institutions,
e.g.

"Lamont-Doherty Geological Laboratory, USA"
=> "Columbia University, USA"

and

"University of Paris, France"
=> "Université Paris VI Pierre et Marie Curie, Paris"
for author "L. Merlivat"

More details in issue #47:
https://github.com/medea-project/ipcc-database/issues/47
Set AUTO_INCREMENT to MAX(id)+1 before inserts with id=0

I left the value '0' in id of new inserts, to get the next value
from the AUTO_INCREMENT sequence.

However, when inserting into a new database, the AUTO_INCREMENT
is initially set to 1 and updated after each new record is inserted
to one more than the highest value.

As a result, inserts done before the highest current id received
a value too low, possibly used in existing records, which failed
to be inserted due to the duplicate key value.
Import/Export CSV: reorder records and assign sequential ids
Remove AUTO_INCREMENT value, now invalid after new inserts

I do not plan to keep the AUTO_INCREMENT values up to date
in the table creation script after each import.

Different strategies can be used instead:
* insert new records using id=0 at the end of the file
* pick a unique value (MAX+1) for the id manually

Also, when a table exists already (not the case here),
it is possible to set the AUTO_INCREMENT to a larger value
in advance with:

  ALTER TABLE `participations` AUTO_INCREMENT = 8001;
Do not duplicate main names in aliases tables

Only the actual aliases (i.e. different from the name recorded
in the main table) shall be recorded, to keep the data meaningful
and the checks easier. The main name is included in CSV exports
in an information column next to the aliases anyway.
Document two choices of aggregation for institutions

See related discussions in issue #47:
https://github.com/medea-project/ipcc-database/issues/47#issuecomment-62255326
https://github.com/medea-project/ipcc-database/issues/47#issuecomment-62255345
Add 3 missing institutions, part of suggested fixes for AR1

The two distinct institutions fail to match with the corresponding
institutions in the database due to a corruption of the text:

* Laboratoire de Glaciologie et GÃ©ophysique de l'Environnement (LGGE)
* Instituto Argentino de NivologÃ­a,GlaciologÃ­a y Ciencias Ambientales