Fix incorrect error message in LoadDB and get rid of call to Form()
Fix bug introduced Sep 3, 2014: THaAnalysisObject needs to implement Clear()

I had overlooked that the base class, TNamed, implements its own Clear,
which clears name and title of the object. Not a good default. Oops.
Add support for continuing database lines without continuation characters

Any lines not containing an '=' character are automatically considered
continuation lines until the next blank line or next line with a '='
is reached. Comment lines within continuation blocks are allowed.
The style using continuation characters, "\", and this new style must
not be mixed within a given block, but different styles may be used in
different blocks of a file.

See the updated database files in DB/20121201 for examples.