Audio crossfade and Audio Title

Removed (set to hidden) audio title for iPhone. Enabled audio crossfade when changing exhibitions from suggested buttons.
Change-Id: Iddcccbed3321c0d6f2b185baa90df527a3ee7914
Update Language View for iPhone

Decrease button size, added bigger logo in splash screen and language view background
Tab bar update

Updated tab bar for iPhone and iPad
Change-Id: I9f28032d93bb31b63498db317fb9ff00b94e0bed
Added Activity indicator and more safer download

Activity indicator will be shown when buffering. Improved download in background - no NULL entries should be written in database.
Location access permission check

Don't allow to enable beacon tracking if location access not provided
Resize Images in UIWebView

Resize images if they are bigger than UIWebView width.
Update picture download

Download pictures in the download operation and save on the device

Change-Id: I6c2aa9084cbb909403e9b490e0727ce9495d42d4
Download fix

Fix data download in detail view, download and save picture only if exist

Change-Id: I62024729a761f4afd895d1f8a6ddce103f70671d
Local picture URL update

Update base URL for local pictures

Change-Id: I0523adb534cc553608369ab3f2c3e8a8c6dc046d
Update exhibition descriptions

Add new exhibition descriptions for Latvian language provided by the museum
Update links

Update links for audio and reachability to the new server address
Detail view beacon fix

Update base url for images