Updated logo in nav

Signed-off-by: Evan Tedesco <evantedesco@gmail.com>
styled category index

Signed-off-by: Evan Tedesco <evantedesco@gmail.com>
category show page renders side nav

Signed-off-by: Evan Tedesco <evantedesco@gmail.com>
refactored category show/index to partial

Signed-off-by: Evan Tedesco <evantedesco@gmail.com>
changed the homepage to category index

Signed-off-by: Evan Tedesco <evantedesco@gmail.com>