The EmField version cannot be tested yet (drop column not yet implemented for sqlite in Database.sqlalter)

Also add a new function is sqlutils to execute ddl

Now _fields and table MUST be class attribute.
Its important to note that _fields now consist in a list of (name, ftype) tuples and that ftype is a EmFieldType class and NOT an EmFieldType instance

Cleaning code for EmComponent
Optimizing tests for EmComponent and EmFieldGroup (running initDb in setUpModule and make a backup copy, the backup is restored in setUp)

- Now except for the modify_rank tests test_component didn't fails
- Added simple integer operation capabilities to EmFieldType_integer ( int cast, +=, -=, *=, /=, +, -, *, /, %, ...)

Maybe very bugy

Written some test setup and the begining of the __init__ test

Using sqlite db in test_components

EmComponent.create() now takes keywords arguments corresponding to the _fields property of the calling class

WARNING !!! Hardcoded rank = -1 at component creation and Hardcoded 0 as default value for EmClass icon

Changed id in uid and changed the dummy class for testing

runtest script has now comments inside showing usefull options to run tests

Added tests for newUid, __init__, save and modify_rank

Written test environment init
Written test for newUid and __init__

Test functions name as tests files name must begin with test in order to be run by manage.py test