- Updated EDOALSQLCache, OWLAxiomsRendererVisitor GraphPatterRendererVisitor to take this into account

Cleaned up URICell

Added comment in OWLAxiomsRendererVisitor explaining how to extend it towards completeness

-This line, and those below, will be ignored--

M    html/relnotes.html
M    html/credits.html
M    test/src/EDOALExportTest.java
M    src/fr/inrialpes/exmo/align/impl/edoal/Linkkey.java
M    src/fr/inrialpes/exmo/align/impl/renderer/OWLAxiomsRendererVisitor.java

With the suppression of the created boolean, the mkdir()
operation was suppressed.
+ Improved exception management
+ and creation conditions

 - suppressed conn variable= use service.getConnection() instead
 - defined prepared queries
 - precompiled on the fly if used only once
 - incremented data base version to 490
 - systematic use of try-with-resources for ResultSet

- alid is now defined and set in Metadata 
- is it initialised to null
- there is a guard for the existence of # in the cell ids

This reduces the number of warning raised by findbugs

outputfilename == null instead of !=

- Suppressed useless catches
- Used Double.compare
- Suppressed unused Clonable

- relies on java.nio.charset.StandardCharsets for character encodings
- any mention of UTF relies on it
- Fixed default encoding assumptions (set to UTF-8 encoding everywhere)

- implemented properly clone() by calling super.clone()
- implemented old (deep) clone by copy constructors
- implemented copy construtors for toObjectAlignment and toEDOALAlignment
- suppressed all clone() from EDOAL
- adapted all the tests
- Deprecated toObjectAlignment() and toEDOALAlignment()