Created DAO and DbHelper
All database functions now work properly.
optimized code for finding files
Merge branch 'db_sjov'

Conflicts:
	app/src/main/java/com/example/sekoia/app/PicturesActivity.java
	app/src/main/res/values/strings.xml
	gradle/wrapper/gradle-wrapper.properties
Merge branch 'master' of https://github.com/maxtile/smap-sekoia-theme-project