piwigo 11 compatibility

New languages:
* Norwegian (Norsk bokmål [NO]), thanks to paulen
* Vietnamese (Việt [VN])

New languages:
* Bulgarian (Български [BG]), thanks to turnokopa
* Danish (Dansk [DK]), thanks to Kaare
* Estonian (Estonian [EE]), thanks to Eggy
* Traditional Chinese (中文 (繁體) [TW]), thanks to azq1231

Add pt_BR, thanks to : glaucio
Add th_TH, thanks to : pradit

Update zh_CN, thanks to : dennisyan
Add zh_CN, thanks to : foddyy

Fixed all warning messages due to Piwigo 2.4.2 - on administration pages

fix for piwigo 2.4.2
Update fa_IR, thanks to : Garcia
Update sk_SK, thanks to : dodo

- Added Spanish (Español ES) Thanks to petaqui & AlbertParera
- Added Czech (Česky CZ) Thanks to sichr
- English UK updated
- Updated Catalan (Català CA) Thanks to AlbertParera
- Updated Greek (ελληνικά GR) Thanks to bas_alba
- Added Dutch (Nederlands NL) Thanks to pauldaytona
- Updated Swedish (Svenska SE) Thanks to styxsailor
- Updated Turkish (Türkçe TR) thanks to LazBoy

- Added Portuguese (Português PT) thanks to PsyKick_RuhYn
= Added German (Deutch DE) thanks to Polly

- Features added:
* Icons from theme "grum-dark-II" added
* Added language Slovak (Slovensky SK) thanks to dodo

- Bugs fixed:
* "Gbo" and "Sylvia" theme sprites updated for Piwigo 2.4
* Themes with a sprite which does not contain new icons for Piwigo 2.4 default to "Tango" theme icons

- Added Ukrainian (Українська UA) thanks to animan

update pl_PL - Polski - Polish - Thanks to kuba

index.php for italian folder
correct id in ext url

adding HU (thx to samli)
adding a new icon set from the default theme
adding iconset_disabled.css in order to set the value of background for disabled icons

adding italian (thx to rio) and lv_LV (Latvian) thanks to Aivars Baldone

the icons from all the themes are inclued
little bug on admin page corrected

for beta test only