Store UconfigEntry data on heap to facilitate appeding operations.

Fix memory allocation issues.

Merge branch 'gui'

Apply row or column names only when they are of Raw or Chars type.

Allow renaming subentries and keys.

Allow editing key values.

Avoid using references from temporary objects (which might lead to

Free allocated memory after invoking keys() and subentries().

Add more options for parsing and writing XML files.

Guess value types when parsing INI files.

Guess value types when parsing CSV files.

Add a sample CSV file; parse values in CSV as "Chars".

Use QHexEdit for hex value editing.

Add a parser for CSV files.

Move the definition of ValueType into class UconfigIO.