Auto merge of #3013 - bstaletic:anaconda_faq, r=puremourning

[READY] Anaconda python FAQ

# PR Prelude

Thank you for working on YCM! :)

**Please complete these steps and check these boxes (by putting an `x` inside
the brackets) _before_ filing your PR:**

- [x] I have read and understood YCM's [CONTRIBUTING][cont] document.
- [x] I have read and understood YCM's [CODE_OF_CONDUCT][code] document.
- [x] I have included tests for the changes in my PR. If not, I have included a
  rationale for why I haven't.
- [x] **I understand my PR may be closed if it becomes obvious I didn't
  actually perform all of these steps.**

# Why this change is necessary and useful

Since the latest anaconda works with YCM, let's just state that it is not supported in the README.

[Please explain **in detail** why the changes in this PR are needed.]

[cont]: https://github.com/Valloric/YouCompleteMe/blob/master/CONTRIBUTING.md
[code]: https://github.com/Valloric/YouCompleteMe/blob/master/CODE_OF_CONDUCT.md

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README.md

@@ -3388,6 +3388,15 @@ plugins is [vim-nerdtree-tabs][]. You should identify which plugin is
 responsible for the issue and report it to the plugin author. Note that when
 this happens, [ycmd][] will automatically shut itself down after 30 minutes.
 
+### YCM does not work with my Anaconda Python setup
+
+Anaconda is often incompatible with the pre-built libclang used by YCM
+and therefore is not supported. The recommended way to solve this is to run
+`/path/to/real/python install.py` (for example `/usr/bin/python install.py`).
+
+If you want completion in Anaconda projects, set
+`g:ycm_python_binary_path` to point to the full path of your Anaconda python.
+
 Contributor Code of Conduct
 ---------------------------