Fix Vim mode on Firefox

Change alpine version to permit ARM and amd64 deployment

[UI] fix custom-select in oscar

Firefox automatically opens a built-in quick search when user
starts typing without selected input and the Vim shortcuts
are not triggered

remove the option of sourcing manage.sh

Fix Microsoft Academic engine

Fix Bing videos engine

Update README.md

ohloh is now openhub

Preserve image aspect ratio in results

Noticed that images are often distorted in the results due to a hard minimum height.  This keeps the 4-per-row image results consistent in row height without distorting wider images.

added searx-ve to gitignore

[fix] Read utf-8 files (settings, languages, currency) with Python3.5

Related to discussion in #1124
The io.open import is necessary for python2

Python3.5 is still the default Python3 version in
Debian Stretch (stable) and Ubuntu 16.04 LTS
https://packages.debian.org/source/stretch/python3-defaults
https://packages.ubuntu.com/source/xenial/python/python3-defaults

Make Python 3 able to read settings files with Unicode characters

Fix yacy engine

Closes #1064

SearX currently doesn't start up when run with Python 3 as it tries to parse the
settings.yml file with ASCII codecs.
There are similar problems with engines_languages.json and currencies.json
Python 3 requires that files with Unicode characters be read with a 'b' flag.
This also works with Python 2 and hence can be integrated into the main source
code.

Tested with the latest Python 3.6.4rc1 on Debian unstable.

Signed-off-by: Joseph Nuthalapati <njoseph@thoughtworks.com>

Logicodev-dark fixes

Fix google searches

Update readme

Stopped a sentence before it got out of hand.

Add links to footers of oscar and simple

Links:
 * Source code
 * Issue tracker
 * List of public instances

Closes #1071

[mod] simplify manage.sh

- npm install less@2.7 less-plugin-clean-css grunt-cli is moved inside manage.sh
- if it is possible to source manage.sh to update the PATH (to start grunt)
- tidy the help documentation
- update the geckodriver version to 0.19.1