Minor layout adjustments

Centred navigation buttons and added a label for them.
Display a Wisdoms image only if it exists
Minor margin adjustments
'Welcome' text adjustments
Removed unused member and added a new one

Added the 'summary' member for a shot summary about the institution.
Added a summery for TVZ
Minor adjustment
Added summary to the layout

Also updated label colors.
Added a simple logo
Added the logo to the About fragment
Added the simple logo to the WelcomeFragment

Also removed the title and added a ScrollView wrapper
Changed title colors
Removed the image from row_wisdom.xml
Remove the ImageView if there isn't a image to display
Minor update to about page information
Remove the ImagePager if there are no images