CodeSnip Old Code (SVN)

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

* Moved several string handling routines from UUtils to UStrUtils. Renamed all and modified some slightly.
* Using code update accordingly.

Removed unused unit references.

* Renamed USnippetKindInfo unit as DB.SnippetKind.
* Updated all using units.

* 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 "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 TRoutineHTML as TSnippetHTML.