templates: improve this & parent commit

Link to parent commit file version in commit view

It makes sense for [oldfile] in [oldfile]->[newfile] to link to the
previous version. This is also how cgit behaves.

css: scroll file content x-axis only

- we don't need any overflow scrolling for the y-axis.
- set overflow-x to 'auto' so that the scroll bar only shows
  when the content does overflow.

readme: add note clarifying cloning

diff: scroll diff on overflow

add license

closes #2

diff: show diff type

file: separate content and line numbers

css: add bg to readme/file content

index: turn off logging, it's too noisy

readme: clarify license

css: scroll file content

decrease prominence of author info in ui

unveil: clarify its uselessness

git: check for binary files

add favicon

readme: more info

config: fix yaml

all: no more pretty urls

templates: message under tag name

css: default monospace font

config: fix go-import pretty url

css: single column index on small screens

all: go-import, clone url

log: cleaner view

routes: skip unopenable dirs

config: scan path

routes: sort repo index by last idle

templates: add title tags

unveil: init

git: rework diff to fetch initial commit

templates: unified repo-header

git, templates: diff view

templates: repo and log

css: wrong name

templates: index rework

routes: serve static content from /static

readme: some bs

routes: disable git push

routes: wildcard multiplex route at the end

routes: multiplex git and web ui

routes: description and humanized time to index

template: line numbers for file view

git: find main branch from config

deps: bump go-git

Now builds without cgo.

config: server host and port

templates: tree and log links for tags

routes: refs view

routes: index view

routes: render readme

templates: fix 404 and 500

template: render diff header lines

git, routes: commit diff view

routes, templates: tree and log views

git: fix trees

routes: file content view

git: file content at ref

routes: split repo index and files views

git: fetch files only using ref

all: init