Re-order import and delete unused imports.
Also delete two obsolethe classes in Zone.
Resolve the most important bugs when trying to create a zone.
Merge branch 'dev' of https://github.com/Mendroyxx/FeatureApp.git into UrbApp_dev

Conflicts:
	Code/src/com/ecn/urbapp/db/Project.java
	Code/src/com/ecn/urbapp/fragments/ZoneFragment.java
	Code/src/com/ecn/urbapp/utils/DrawImageView.java
	Code/src/com/ecn/urbapp/zones/UtilCharacteristicsZone.java
Slight improvement in the calculation of ids. Still False, but quite more safe.
Improve the dialog to characterize elements.
Merge pull request #69 from jparty/UrbApp_dev

Resole near all the bugs from my part