add IGN GEOFLA® communes data

add support of IGN GEOFLA® communes displayed with option -R (French
region, department, cities)
add hostname option (-H <psql server hostname>) in psql connection
correction in populating script

copy data from text file for geoname cities made with \COPY SQL command
remove replace of ` character int geoname table (special character
misinterpreted by shells)
Extend of french region options

-R option takes now 2 parameters:
main to get geonames values
all to get GEOFLA® values: region and departements with code, commune
with coverage ratio.
change order in french communes request

sort french communes with 2 criterias, coverage ratio and area
add french arrondissements

Add french arrondissement with option -R all
add GEOFLA® arrondissement data
Merge remote-tracking branch 'upstream/master'

Conflicts:
	README.md
	functions.php
	install/data.zip
	install/itagPopulateDB.sh
	itag.php
merge with itag new issue
french commune are ordered by population
remove old merging remains
remove old merging remains
Merge branch 'master' of http://github.com/thhomas/itag

Conflicts:
	README.md
Merge pull request #2 from thhomas/master

IGN modification - Good addons for French only projects :)