Added support to or, not, and to SchemaParser. Now user can write simple
logical expressions on %if's. (issue #185)

Schema files (for SQL code) aren't organized in folders any more. All
code (for different pgsql versions) will be in the same .sch file for
each object.
Added the method BaseObjectWidget::setRequiredField() that highlight the
specified widget as a required field on form.

Added the system_obj property to BaseObject that indicates if the object
is a PostgreSQL reserved object (e.g, schema public, languages SQL, C).

Minor fixes on syntax highlighter. Now when a word ground does'nt has a
background defined it will be transparent bg color.

Models now are correclty auto saved when are modified (issue #188)

Fixed operator's signature generation.
Removed texts from COMPILING.md and PLUGINS.md, soon the files will be
removed.

Added Collation objects to ModelObjectsWidget.

Added two new exceptions related to collations.

Created schema files for Collations.
Collation icon update.
Temporarily disabled the creation of primary keys that has columns added
by relationship (issues #190)
Object Collation implemented. Pending editing form to handle its
attributes.

Database model loads collations from XML.

Added collations to code generation method on DatabaseModel.
Added validations when removing Collations.

Added collations to colum, index and domain DTDs.

Added a field "Collation" to BaseObjectWidget.
Collation editing form implementation done.
Major bug fixes on relationship class and relationship editing form

Minor bug fixes on BaseObjectWidget

Added [NOT] LEAKPROOF key work to FunctionType

Added collation attribute to Domains
Commiting missing files of e1c858de3e2eca9508a1fbe70d9502ead2ebcff1
Removed PostgreSQL 8.x attributes from Operator

Added collation support for index elements

Minor adjustments on FunctionWidget, OperatorWidget, LanguageWidget and
IndexWidget
Added FOR ORDER BY  and removed Recheck from OperatorClassElement
Added "REPLICATION" options to roles.

Minor adjustments on editing forms.
Created the PgModeler namespace to organize general functions /
constants used in libpgmodeler library.

Add option "NO INHERIT" option to check constraints.

Created Exclude constraint. Pending editing form modification to accept
this new type.

Minor changes on Index class.
Updated trans fr
Created a base class Element class which handles basic attributes
for index / exclude constraint elements.

Updated IndexElement class now it inherits Element class

Created the ExcludeElement class which inherits Element class

Created the ElementsWidget to permit the creation/edit of index/
exclude constraints elements.
Merge pull request #196 from babs/pgsql9x-support-trans-fr

Updated trans fr
Implemented EXCLUDE constraint support (issue #193)
Minor fix on constraint class

Minor change on ModelObjectsWidget

Minor change on TableObjectView
Add support to INCLUDING/EXCLUDING options when dealing with copy
relationships. (issues #194)

Minor fixes on Relationship class

Minor changes on Table editing form