Little code cleanup.

Changed a little bit of documentation and some variable names.

Change-Id: I292bf63b41c2b7d0a5ee7f03eb8ca49bf42b64ee
The selected theme is now applied to the suite.

1. Added IMPL_LINKs for the result buttons.
2. Created a vector to store the temporary persona settings in the
   format: name;headerURL;footerURL;textColor;accentColor.
3. When a button is clicked, the corresponding setting is copied to
   m_aPersonaSetting.
4. The persona setting is parsed in CopyPersonaToGallery and the
   header and footer images are downloaded.

Change-Id: Ib83016ad5bdfa83963843146ef6a4674fcd73868