[docs] user: translate documentation in english

doc/en/user/install-durs.md

+# Installing DURS on your computer
+
+## Basic install
+
+In any case, you will have to:
+
+1. choose between server version or desktop version
+2. which version number you want
+3. select the release corresponding to your operating system and processor architecture
+
+### `durs-server` or `durs-desktop`
+
+`durs-desktop` comes with a graphic user interface and is made for people who want to install it in their desktop computer
+
+`durs-server` is much lighter but only has a terminal user interface. It's recommended for:
+
+* Installing on a remote server
+* Installing on a low performance computer
+* For users who are confortable with command line interfaces
+
+Note: it's possible to remotely control `durs-server` via a graphic user interface (see [durs remote admin]).
+
+## Choose the durs version to install
+
+<s>You can get the last stable version on [the official Durs website](durs.info)</s>
+
+If you have any question about which version to install, ask it on the [duniter forum](https://forum.duniter.org/).
+
+You will find all available version on [this gitlab page](https://git.duniter.org/nodes/rust/duniter-rs/tags)
+
+The 4 types of version are:
+
+* **alpha**: the most advanced test version, likely to have unstable behavior, suitable for alpha-testers
+* **beta** : more usable test version, open to all testers
+* **RC**: release candidate, a version that can be used in production by advanced users provided they check for updates in case of security issue
+* **stable** : the more stable version, intended for all users
+
+### Choose the release correspondig to your operating system and processor architecture
+
+The `Category` column of the releases table tells you which system the release targets. (in case of GNU/Linux system, the distribution is in brackets)
+
+If no release has been made for you, fall back to the manual installation below.
+
+## Manual installation
+
+To install Durs manually, you must first [install Rust](https://www.rust-lang.org/tools/install).
+
+Then install Durs dependencies. Here is how to do on Debian based systems:
+
+    apt-get install pkg-config libssl-dev # install required packages
+    git clone https://git.duniter.org/nodes/rust/duniter-rs.git # clone the Durs repository
+
+Change your current directory to the folder correspondig to the variant you want to build:
+
+* For `durs-server`, go into `bin/durs-server`
+
+    cd bin/durs-server
+
+* For `durs-desktop`, go into `bin/durs-desktop`
+
+    cd bin/durs-desktop
+
+Then build Durs with the command:
+
+    cargo build --release --features ssl
+
+In case of problem with `openssl`, you can try building without the `ssl` feature:
+
+    cargo build --release
+
+This just means that your node will not be able to contact the WS2P endpoints that are behind an SSL/TLS layer.  
+Your node should still work normally if there is enough unencrypted WS2P endpoints.
+
+If the build succeeds, your binary will lay in `duniter-rs/target/release` with the name `durs` or `durs-desktop`.
+You can place it anywhere and run it without other requirement.

doc/en/user/synchronise-durs-node.md

+# Synchronise your Durs node
+
+## Synchronise from the network
+
+This feature is not yet available in Durs.
+
+## Synchronise from a local Duniter node
+
+Make sure you have a Duniter node (duniter-ts) syncronised on the same computer.
+
+If you run Durs with the same system user, you only need to use the `--type` option as follows:
+
+    durs sync --type ts
+
+`ts` refers to the fact that Duniter is written in TypeScript.
+
+If you run Durs and Duniter with a different system user, you must tell Durs the path of the raw blockchain in JSON format.
+It is usually located in  `~/.config/duniter/<profile>/<currency>`.
+
+Example:
+
+for a GNU/Linux system, with a duniter user called `user`, the path is:
+
+    home/user/.config/duniter/duniter-default/g1
+
+append it to the end of the command like this:
+
+    durs sync --type ts home/user/.config/duniter/duniter-default/g1
+
+/!\ it is only necessary if you run Durs and Duniter with two different system users.
+For the same user, Durs should find the blockchain path automatically.