Changed pip3 install instructions for U14.04

docs/source/installing.md

@@ -7,7 +7,7 @@ We're developing BigchainDB on Ubuntu 14.04, but it should work on any OS that r
 The RethinkDB documentation has instructions for how to install RethinkDB Server on a variety of operating systems. Do that (using their instructions for your OS): [Install RethinkDB Server](http://rethinkdb.com/docs/install/).
 
 RethinkDB Server doesn't require any special configuration. You can run it by opening a Terminal and entering:
-```shell
+```text
 $ rethinkdb
 ```
 
@@ -20,7 +20,7 @@ If you don't already have it, then you should [install Python 3.4+](https://www.
 BigchainDB has some OS-level dependencies. In particular, you need to install the OS-level dependencies for the Python **cryptography** package. Instructions for installing those dependencies on your OS can be found in the [cryptography package documentation](https://cryptography.io/en/latest/installation/).
 
 On Ubuntu 14.04, we found that the following was enough (YMMV):
-```shell
+```text
 $ sudo apt-get update
 $ sudo apt-get install libffi-dev g++ libssl-dev python3-dev
 ```
@@ -30,38 +30,34 @@ With OS-level dependencies installed, you can install BigchainDB with `pip` or f
 ### How to Install BigchainDB with `pip`
 
 BigchainDB is distributed as a Python package on PyPI so you can install it using `pip`. First, make sure you have a version of `pip` installed for Python 3.4+:
-```shell
+```text
 $ pip -V
 ```
 
-If it says the associated Python version is Python 3.4+, then you can do:
-```shell
-$ pip install bigchaindb
+If it says that `pip` isn't installed, or it says `pip` is associated with a Python version less then 3.4, then you must install a `pip` version associated with Python 3.4+. See [the `pip` installation instructions](https://pip.pypa.io/en/stable/installing/). On Ubuntu 14.04, we found that this works:
+```text
+$ sudo apt-get install python3-setuptools
+$ sudo easy_install3 pip
 ```
+(Note: Using `sudo apt-get python3-pip` also installs a Python 3 version of `pip` (named `pip3`) but we found it installed a very old version and there were issues with updating it.)
 
-If it says that `pip` isn't installed, or it says `pip` is associated with a Python version less then 3.4, then you must install a `pip` version associated with Python 3.4+. See [the `pip` installation instructions](https://pip.pypa.io/en/stable/installing/).
-
-On Ubuntu 14.04, we found that this works:
-```shell
-$ sudo apt-get python3-pip
-$ sudo pip3 install bigchaindb
+Once you have a version of `pip` associated with Python 3.4+, then you can install BigchainDB using:
+```text
+pip install bigchaindb
 ```
-
-(It might not be necessary to use `sudo` in the last command above, but we found that it _was_ necessary for Ubuntu 14.04 on an Amazon Web Services (AWS) instance.)
-
-In general, once you have a version of `pip` associated with Python 3.4+, then you can install BigchainDB using `pip install bigchaindb` or `pipVER install bigchaindb` where `pipVER` is replaced by whatever you must use to call a version of `pip` associated with Python 3.4+ (e.g. `pip3`).
+(or maybe `pip3 install bigchaindb` or `pip3.4 bigchaindb`.)
 
 ### How to Install BigchainDB from Source
 
 BigchainDB is in its early stages and being actively developed on its [GitHub repository](https://github.com/bigchaindb/bigchaindb). Contributions are highly appreciated.
 
 Clone the public repository:
-```shell
+```text
 $ git clone git@github.com:bigchaindb/bigchaindb.git
 ```
 
 Install from the source:
-```shell
+```text
 $ python setup.py install
 ```
 
@@ -72,7 +68,7 @@ Coming soon...
 ## Run BigchainDB
 
 After installing BigchainDB, run it with:
-```shell
+```text
 $ bigchaindb start
 ```