Merge 'warnfree' into 'trunk'

Another round of warning-squashing:
Fix source registration/unregistration in several places
Accomodate postgres being really load on CREATE
Move the taint tests to a non-mainstream schema - hopefully this one will not be disturbed for a while
Fix warning due to File::Copy being sloppy
Test for TxnScopeGuard warnings
Test for multiple register_class warnings
Blindly silence a weird warning within a TODO in t/47bind_attribute.t. Hopefully when the TODO is resolved, it will be obvious what was causing it

diff --cc lib/DBIx/Class/InflateColumn/File.pm
index d462bcc,9687f94..78e316b
--- 1/lib/DBIx/Class/InflateColumn/File.pm
--- 2/lib/DBIx/Class/InflateColumn/File.pm
+++ b/lib/DBIx/Class/InflateColumn/File.pm
@@@ -95,8 -95,8 +95,10 @@@ sub _save_file_column 
  
      my $fs_file = $self->_file_column_file($column, $value->{filename});
      mkpath [$fs_file->dir];
--    
-     File::Copy::copy($value->{handle}, $fs_file);
 -    File::Copy::copy($value->{handle}, $fs_file->stringify);    # File::Copy doesn't like Path::Class (or any for that matter) objects
++
++    # File::Copy doesn't like Path::Class (or any for that matter) objects,
++    # thus ->stringify (http://rt.perl.org/rt3/Public/Bug/Display.html?id=59650)
++    File::Copy::copy($value->{handle}, $fs_file->stringify);
  
      $self->_file_column_callback($value, $self, $column);
  

diff --cc t/93storage_replication.t
index 07e696a,0293804..ab2ffe4
--- 1/t/93storage_replication.t
--- 2/t/93storage_replication.t
+++ b/t/93storage_replication.t
@@@ -59,10 -59,9 +59,13 @@@ TESTSCHEMACLASSES: 
      ## Get the Schema and set the replication storage type
      
      sub init_schema {
++        # current SQLT SQLite producer does not handle DROP TABLE IF EXISTS, trap warnings here
++        local $SIG{__WARN__} = sub { warn @_ unless $_[0] =~ /no such table.+DROP TABLE/ };
++
          my $class = shift @_;
--        
++
          my $schema = DBICTest->init_schema(
 +            sqlite_use_file => 1,
              storage_type=>{
                '::DBI::Replicated' => {
                        balancer_type=>'::Random',