Also adding direct links to download it

* Mostly fixing text escapes on sql queries
* Also gettting the date from the new folder format
* Also resorting the sql execution order, so cells from outside of
galicia are added also.

Resolve "SQL execution does not wait for file creation"

Closes #1

See merge request covid/data-importer!1

First time it executes, it updates the names of the cells

* The new parser handles all xls old data except 3
FlujosDestino100+_M1_NOV - Galicia, which requires an specific parser

The writer is the same than FlujosDestino, just adding on conflict
nothing to avoid adding two files with the same data (conflict on pkey)

Otherwise, the files are not created. This could be done in a much
better way, using the promises of the parsers, but it is enough for
now

* Getting date from file path
* Trim headers and cells of CSVs

* It seems that CSVParser can be used with any of the CSV to parse. All
the logic is in the writer class.
* Method parse now returns a promise since csv-parser is asyncronous.
* Now checking partial filename and extension in order to choose parser
and writer.
* Now using a prefix and the original filePath instead of setting the
full sql file name.
* Handling encoding of the csv files (ISO-8859-1) in a generic way.

* Apparently the order of the rows is not fixed, running the code in a
different computer caused problems

* Automatically run the sql files generated
* There is a very basic promise queue so sqls are run synced

* Using trim to recover texts from excels
* Avoiding files with ~$ in name
* Updating schema

* Created sql schema and updated the previous with foreign keys
* Adding inserts into celda, they were missing in the previous version
* Adding parser and writer for file cod_postal_celdas_movilidad.xlsx