Adjust theme via catalog.css & style.css

Changes to catalog.css:

  - Forced all threads to a height of 300px and reduced padding to
    improve consistency. I think it improves the readability quite a bit
    but I may be alone in thinking this way.
  -

Changes to style.css:

  - Removed additional padding to allow new catalog spacing
Corrected thread padding via style.css
Merge pull request #90 from kaernyk/master

Adjust catalog for uniformity/mobile