buggy exports. CRS is not recognized + No attributes.

[severinmenard]

Used download point dated as of today in http://export.hotosm.org/fr/jobs/6352 2 issues:

• CRS is not recognized in QGIS 2.2
• nothing shows up and the attributes table appears as empty when opened

[dodobas]

this is related to the SHP file limit (https://en.wikipedia.org/wiki/Shapefile#Limitations)

some of the tools can create larger SHP files, but those are not usually readable by other common software

[dodobas]

We could handle it by:

• if the large SHP files are not usable, we should not create them
• inform user that SHP files are not compatible with most software