CodeSnip Old Code (SVN)

* Added new UStrUtils unit to contain string utility functions.
* Added new StrPos and StrContainsStr routines to new unit.
* Replaced all AnsiPos, Pos and PosEx routines in project with StrPos and StrContainsStr, depending on how routine was used.

Merged trunk changes for release 3.8.10 (i.e. r1320, r1321, r1418, r1419, 1421 to 1427) into the v4-dev branch.

Resolved conflicts. Most by using selected entries from each file. Except that v4-dev brach's version of VCodeSnip.vi kept unchanged.

Some files are physically unchanged and have changes only to their svn:mergeinfo property.

* Extracted TUserDetailsPersist from UUserDetails to new UUserDetailsPersist unit.
* Modified TUserDetailsPersist so that it no longer updates TUserDetails fields directly but treats the record as immutable.
* Modified code that uses TUserDetailsPersist to use new unit.

Separated entangled UI and database update logic in UCodeImportMgr unit.
* New unit added containing dialog box to handle UI. This is a v4 only improvement on existing UI.
* Completely rewrote TCodeImportMgr to perform import in stages to allow user to manually filter the import via the dialog box.
* Modified TCodeShareMgr.ImportCode to use new code.

* Renamed again all DB.* units that are concerned with physically reading and writing database info to and from the file system as DBIO.*.
* Affected units updated.

* Renamed UIniDataReader, UNulDataReader and UXMLDataIO units as DB.UIniDataReader, DB.UNulDataReader and DB.UXMLDataIO respectively.
* Updated using unit.

* Renamed USnipData unit as DB.UFileIOIntf and USnippetsIO as DB.UDatabaseIO.
* Updated affected units.

* 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.