fixed new exercises not being displayed in view after adding them, fixed some redundent code
made all pages except neils have the same button styles. Also added some missing headers and changed the size of the existing headers. I didn't change Neil's buttons because I might change some stuff after.
Merge pull request #263 from maronin/UICentreChanges

made all pages except neils have the same button styles. Also added some...
Merge pull request #259 from maronin/issue#258

fixed new exercises not being displayed in view after adding them, fixed...