Added pyenv install script and readme

diff --git a/pyenv/README.md b/pyenv/README.md
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+---
+title: pyenv
+homepage: https://github.com/pyenv/pyenv
+tagline: |
+  pyenv: Simple Python Version Management
+---
+
+### Updating `pyenv`
+
+```bash
+pyenv update
+```
+
+## Cheat Sheet
+
+### List available python versions:
+
+```bash
+pyenv install -l
+```
+
+### Install Python versions:
+
+```bash
+pyenv install <version>
+pyenv rehash
+```
+
+### pyenv versions
+
+List installed versions:
+```bash
+pyenv versions
+```
+
+### pyenv local
+
+Sets a local application-specific Python version:
+```bash
+pyenv local 2.7.6
+```
+
+Unset the local version:
+```bash
+pyenv local --unset
+```
+
+### List existing virtualenvs
+```bash
+pyenv virtualenvs
+```
+
+### Create virtualenv
+
+From current version with name "venv35":
+```bash
+pyenv virtualenv venv35
+```
+From version 2.7.10 with name "venv27":
+```bash
+pyenv virtualenv 2.7.10 
+venv27
+```
+### Activate/deactivate
+
+```bash
+pyenv activate <name>
+pyenv deactivate
+```
+
+### Delete existing virtualenv
+```bash
+pyenv uninstall venv27
+``` 
\ No newline at end of file

diff --git a/pyenv/install.sh b/pyenv/install.sh
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+#!/bin/bash
+
+{
+    curl -L https://github.com/pyenv/pyenv-installer/raw/master/bin/pyenv-installer | bash
+    if [ -n "`$SHELL -c 'echo $ZSH_VERSION'`" ]; then
+        echo 'export PATH="$HOME/.pyenv/bin:$PATH"'>> ~/.zshrc
+        echo 'eval "$(pyenv init -)"'>> ~/.zshrc
+        echo 'eval "$(pyenv virtualenv-init -)"' >> ~/.zshrc
+    else
+        echo 'export PATH="$HOME/.pyenv/bin:$PATH"'>> ~/.bashrc
+        echo 'eval "$(pyenv init -)"'>> ~/.bashrc
+        echo 'eval "$(pyenv virtualenv-init -)"'>> ~/.bashrc
+    fi
+}