Add download step (#243)

Author: albfan

README.md

@@ -11,6 +11,7 @@ A Java [language server](https://github.com/Microsoft/vscode-languageserver-prot
 ### Vim (with vim-lsc)
 
 - Checkout this repository
+- Run `./scripts/download_{linux|mac|windows}.sh`
 - Run `./scripts/link_{linux|mac|windows}.sh`
 - Run `mvn package -DskipTests`
 - Add the vim plugin [natebosch/vim-lsc](https://github.com/natebosch/vim-lsc) to your vimrc
@@ -25,6 +26,7 @@ Note: This tool is not compatible with [vim-lsp](https://github.com/prabirshrest
 ### KDE Kate
 
 - Checkout this repository
+- Run `./scripts/download_{linux|mac|windows}.sh`
 - Run `./scripts/link_{linux|mac|windows}.sh`
 - Run `mvn package -DskipTests`
 - Open your Kate editor
@@ -48,6 +50,7 @@ Note: This tool is not compatible with [vim-lsp](https://github.com/prabirshrest
 ### Sublime 3 (with LSP)
 
 - Checkout this repository
+- Run `./scripts/download_{linux|mac|windows}.sh`
 - Run `./scripts/link_{linux|mac|windows}.sh`
 - Run `mvn package -DskipTests`
 - Open your Sublime 3