Fix database problems:

Add 'table_info_short' and/or table_exists' for some of the drivers;
Add test for db methods for sqlite;
If 'table_info_short' not implemented, just return it's not fatal;
Fix issue #6.
Move parameter controls to a sub.

Should make layout changes easy.
Move log control to a sub.
Add splitter with 2 panes, move log controll to the bottom pane.
Replace Wx::STC with Wx::Scintilla.
Add abstract, clenup.
Rename page.
Add connection detail controls, other small changes.
Fix select default item in lists.
Factor out forms from pages.

Rename methods change, 'create' with 'build';
Reorder methods;
Rename the Parameters page to Info, move params to the SQL page.
Die on not enough parameters for get_details_for.
Add load_conn_details method.
Inform the user about the current database and driver in the login dialog.
Merge remote-tracking branch 'upstream/devel' into devel