[bukuserver] Favicon

[LeXofLeviafan]

fixes #621:

• implementing a static bukuserver/favicon.svg file
  note: it has to be 16x16 px to be displayed correctly in browser tabs, and not specifying a font results in a different icon being displayed in different browsers (possibly depending on various user font settings?)
• adding a /favicon.ico route with permanent redirect to said file
  note: once the browser got a 404 on favicon request, it stops requesting the favicon until you close and reopen the browser itself (private/incognito mode doesn't help); the workaround of loading the icon manually only works in Firefox

also:

• adding a link to Wiki article on favicons in bukuserver readme file
• adding test output files to .gitignore to ensure they don't end up committed by accident

[rachmadaniHaryono]

remove this one too

buku/bukuserver/templates/bukuserver/base.html

Lines 5 to 8 in 3e407bf

	{% block styles %}
	{{super()}}
	<link rel="icon" href="data:;base64,iVBORw0KGgo=">
	{% endblock %}

[rachmadaniHaryono]

subfolder .gitignore

any reason not to put it on main .gitignore?

[LeXofLeviafan]

remove this one too

This file is no longer used in the first place; it'd make more sense to remove it entirely (along with other dead code).

[rachmadaniHaryono]

./bukuserver/server.py:17:1: F401 'flask_paginate.Pagination' imported but unused
./bukuserver/server.py:17:1: F401 'flask_paginate.get_page_parameter' imported but unused
./bukuserver/server.py:17:1: F401 'flask_paginate.get_per_page_parameter' imported but unused
./bukuserver/server.py:29:1: F401 'flask.render_template' imported but unused

[LeXofLeviafan]

…Speaking of running tests locally – one of test_network_handler_with_url runs (corresponding to a Google search query) always fails on my machine due to Google server responding with HTTP 429 Too Many Requests (I get the same response when sending the request with wget).

Not sure why this happens (perhaps it's related to me using a VPN for internet access?), but it certainly results in guaranteed fails every time I run unit tests locally. (…Does it really count as a unit test if the network requests are actually being sent? Normally you'd expect the requests themselves to be mocked or at least extracted to external functionality, in part to avoid such factors from affecting the outcome – after all, I doubt that the goal is to test specifically whether the code can communicate with Google servers.)

[jarun]

Thank you!