Bug 12462: Fix some POD errors

Bug 12041 made xt/author/podcorrectness.t consider files in the 'Koha' namespace.
Some of them where failing. This patch fixes some of those POD problems.

Best regards
To+

Test:
1) run prove xt/author/podcorrectness.t
it fails
2) apply patch
3) run again, now it's ok

Signed-off-by: Bernardo Gonzalez Kriegel <bgkriegel@gmail.com>
Before patch test fails. After it, it pass
No koha-qa errors

Signed-off-by: Katrin Fischer <Katrin.Fischer.83@web.de>
Signed-off-by: Tomas Cohen Arazi <tomascohen@gmail.com>

C4/Charset.pm

@@ -44,6 +44,8 @@ BEGIN {
     );
 }
 
+=encoding UTF-8
+
 =head1 NAME
 
 C4::Charset - utilities for handling character set conversions.

C4/SIP/ILS/Item.pm

@@ -25,6 +25,8 @@ use Koha::Database;
 
 our $VERSION = 3.07.00.049;
 
+=encoding UTF-8
+
 =head1 EXAMPLE
 
  our %item_db = (

Koha/Borrower/Files.pm

@@ -36,6 +36,10 @@ BEGIN {
 
 Koha::Borrower::Files - Module for managing borrower files
 
+=head1 METHODS
+
+=over
+
 =cut
 
 sub new {
@@ -75,8 +79,11 @@ sub GetFilesInfo {
 }
 
 =item AddFile()
+
     my $bf = Koha::Borrower::Files->new( borrowernumber => $borrowernumber );
-    $bh->AddFile( name => $filename, type => $mimetype, description => $description, content => $content );
+    $bh->AddFile( name => $filename, type => $mimetype,
+                  description => $description, content => $content );
+
 =cut
 
 sub AddFile {
@@ -100,8 +107,10 @@ sub AddFile {
 }
 
 =item GetFile()
+
     my $bf = Koha::Borrower::Files->new( borrowernumber => $borrowernumber );
     my $file = $bh->GetFile( file_id => $file_id );
+
 =cut
 
 sub GetFile {
@@ -119,8 +128,10 @@ sub GetFile {
 }
 
 =item DelFile()
+
     my $bf = Koha::Borrower::Files->new( borrowernumber => $borrowernumber );
     $bh->DelFile( file_id => $file_id );
+
 =cut
 
 sub DelFile {