CodeSnip Old Code (SVN)

Renamed various properties, fields, method names and parameter concerning category ids.

* Renamed USnippets unit as DB.UMain.
* Updated all affected units.

* Extracted code that deals with categories and category lists from USnippets into new DB.UCategory unit.
* Modified affected code accordingly.

* Extracted code that deals with snippets and snippet lists from USnippets into new DB.USnippet unit.
* Modified affected code accordingly.

* Renamed various types in USnippets to have a database related name.
* Modified affected code.

* Renamed "Snippets" function in USnippets to "Database".
* Updated all using code.

Refactoring:
* Renamed numerous identifiers that refer to "routine" with those that refer to "snippets" where appropriate.
* Updated calling code where required.

Refactoring: Renamed some methods and parameters in IntfNotifier and changed implementation and using code accordingly.

Refactoring:
* Renamed components, variable and method names etc. that were named "routines" when "snippets" is more appropriate.
* Updated any effected using unit.

Refactoring: Renamed some enumerated values of TSnippetChangeEventKind.