[LaCentraleBridge] Add new bridge

[JackNUMBER]

Hi,
I made a bridge for lacentrale.fr. It's a french website to buy/sell wheeled vehicles.
It was pretty easy, the website has no counter-fraud.

I applied all main filters. For the brand input you can't selected several options, I hope #1199 will be accepted for this.

Test

This search is equal to this settings with the bridge:

?action=display&bridge=LaCentrale&type=moto&brand=SUZUKI&model=GSX-S&versions=&category=&pricemin=&pricemax=8000&location=&distance=&region=FR-IDF&mileagemin=&mileagemax=&yearmin=2018&yearmax=&cubiccapacitymin=750&cubiccapacitymax=750&fuel=&gearbox=&doors=&firsthand=on&seller=&sort=priceAsc&format=Html

Let me know any changes needed.
Thanks for reviewing.

[logmanoriginal]

Thanks for the PR. The bridge looks good to me, but Travis is reporting a few issues. Please take a look at the build results: https://travis-ci.org/RSS-Bridge/rss-bridge/jobs/552538624

FILE: /home/travis/build/RSS-Bridge/rss-bridge/bridges/LaCentraleBridge.php
--------------------------------------------------------------------------------
FOUND 3 ERRORS AFFECTING 3 LINES
--------------------------------------------------------------------------------
 465 | ERROR | [ ] String concat is not required here; use a single string
     |       |     instead
 466 | ERROR | [ ] String concat is not required here; use a single string
     |       |     instead
 472 | ERROR | [x] Space found before semicolon; expected "];" but found "]
     |       |     			;"
--------------------------------------------------------------------------------
PHPCBF CAN FIX THE 1 MARKED SNIFF VIOLATIONS AUTOMATICALLY
--------------------------------------------------------------------------------

[JackNUMBER]

Thanks for the highlight, I was focused on the red line in the Travis' log and didn't see these errors.
It decreases a bit the readability of the code 😕

Then, it's fixed

[teromene]

Thanks for the PR ! As for the multiple select, I might take a look