Update doc read_network(): uniqueness of origin-destination data, invalidity of quotes in names, consistency of coordinates.

- Rather than the smallest which produced large rasters and bad performance in regions with a long form factor.

- Install some packages from binaries in Travis-CI

- Avoid installing source packages at all in Appveyor for preventing errors

- Install geonetwork from CRAN

- Caused errors installing in some locales (bug report Javad)

- This can occur for units to small to contain a raster cell centre, or that are small islands

- fixes #32

fixes #27

# Conflicts:
#	inst/interface/server.R

- fixes #8

- fixes #17

Merge branch 'interface_v2' of github.com:Cirad-ASTRE/mapMCDA into interface_v2

# Conflicts:
#	inst/interface/global.R

Use shinyFiles

- they don't get installed as proper vignettes by install_github anyway

- better build the pkgdown website and browse online

- fixes #16

- More flexible input: Detect field and decimal separators.

- fixes #15