Updated requirements (markdown)

requirements.md

@@ -13,23 +13,18 @@ Git 1.8 or greater is recommended.
 #### Neovim
 
 Simply install [neovim](https://github.com/neovim/neovim/wiki/Installing-Neovim) to make use of the job based installer.
-The one caveat is that it is [not synchronous](https://github.com/junegunn/vim-plug/issues/104) like the python or ruby installers.
-This affects you when scripting, for instance `nvim +PlugUpdate +qa`.
-In such cases vim-plug will use the python installer - which is synchronous - when available.
 
-To use the python installer, install the pypi neovim library, optionally to root with sudo.
+## Parallel installer
 
-```viml
-pip install neovim
-```
+#### Vim 8
 
-You can check the neovim module is working inside nvim by doing:
+vim-plug starts non-blocking, parallel installer on Vim 8. You can append `--sync` flag to `PlugInstall` or `PlugUpdate` command to make the installer block the control until completion.
 
-```viml
-:python print 'python works'
-```
+#### Vim 7
 
-#### Ruby
+If you use Vim 7, Ruby or Python is required to start parallel installer
+
+##### Ruby
 
 The ruby installer requires the ruby interpreter (1.8.7+) and vim compiled with `+ruby` support.
 
@@ -39,7 +34,7 @@ You can check it works inside vim by:
 :ruby puts 'ruby works'
 ```
 
-#### Python 2 or 3
+##### Python 2 or 3
 
 The python installer requires python version >= 2.6 or any version of 3.
 Python 2.7 is recommended as many plugins still require `+python`.