Update source-control requirement & WP-CLI docs (#158)

* Elaborate on the source control requirements

* WP-CLI: Mention language-pack build —all flag

* Clarify plugin & theme integration documentation

* Update minimum requirements for registry.

docs/cli.md

@@ -18,12 +18,12 @@ Generate language packs for one or more projects.
 wp traduttore language-pack build <project>
 ```
 
-Language packs will automatically be updated upon translation changes.
-
-This WP-CLI command is mostly useful for debugging / testing.
+Language packs will automatically be updated upon translation changes. This WP-CLI command is mostly useful for debugging / testing.
 
 Use the `--force` flag to force ZIP file generation, even if there were no changes since the last build.
 
+Use the `--all` flag to generate the language packs for all active projects.
+
 ## List project language packs
 
 List language packs for the given project.

docs/installation.md

@@ -22,9 +22,11 @@ To send Slack notifications, Traduttore requires a separate WordPress plugin. [L
 
 Traduttore requires at least PHP 7.1, while the [Traduttore Registry](https://github.com/wearerequired/traduttore-registry) also supports PHP 7.0.
 
-To download the latest code from your source code repositories, Traduttore requires Git to be installed on the server. For string extraction Traduttore requires [WP-CLI](https://wp-cli.org/) 2.0 or newer. [Learn more about the available CLI commands](cli.md).
+To download the latest code from your source code repositories, Traduttore requires the respective version control to be installed on the server. Depending on the projects it may be Git, Subversion or Mercurial.
 
-If you're not sure whether Git or WP-CLI are available on your system, please contact your hosting provider.
+For string extraction Traduttore requires [WP-CLI](https://wp-cli.org/) 2.0 or newer. [Learn more about the available CLI commands](cli.md).
+
+If you're not sure whether Git or WP-CLI are available on your system, please contact your hosting provider or run the WP-CLI command `wp traduttore info`.
 
 ## Installing Traduttore
 

docs/integration.md → docs/plugin-theme.md

@@ -1,21 +1,21 @@
 ---
 layout: default
-title: Integrating Traduttore
+title: Plugin & Theme Integration
 nav_order: 9
 ---
 
-# Integration
+# Plugin & Theme Integration
 
 Using our little helper library called [Traduttore Registry](https://github.com/wearerequired/traduttore-registry), you can then tell WordPress that translations for your project should be loaded from Traduttore.
 
-**Note:** Traduttore Registry requires PHP 7.0 or higher.
+**Note:** Traduttore Registry requires PHP 7.1 or higher.
 
 ## Setting up Traduttore Registry
 
 If you're using [Composer](https://getcomposer.org/) to manage dependencies, you can use the following command to add the library to your WordPress plugin or theme:
 
 ```bash
-composer require wearerequired/traduttore
+composer require wearerequired/traduttore-registry
 ```
 
 After that, you can use `Required\Traduttore_Registry\add_project( $type, $slug, $api_url )` in your theme or plugin.