fixes image reference in getting_started.rst (#130)

* moved Aer tutorial images to /docs/images/figures/

and all references to these images

* Have Makefile point to correct Aqua and Chemistry directories

Fixes #88

* Revert "Have Makefile point to correct Aqua and Chemistry directories"

This reverts commit fee13ba.

* Create community_qiskit.rst

* Revert "Create community_qiskit.rst"

This reverts commit 5fd2caf.

* update global install instructions

Motivation: to synthesize the mostly duplicate install instructions currently under each Qiskit element's doc section, which can then be removed.

Direct to CONTRIBUTING files in each element's repo for instructions to build from source, since this serves a niche persona and is lengthy.

Added images for steps that involve pointing and clicking through the web.

Rewrote material for additional clarity.

* removed Troubleshooting section

fixes #97

* simplify the ibm q provider documentation

Fixes Qiskit/qiskit#86

* removed Visualizations from global ToC, honed Installing QIskit

Fixes #107 and fixes #95

* added Contributin to Qiskit

fixes Qiskit/qiskit#112

* remove Aer install instructions

fixes Qiskit/qiskit#84

* Have the ToC do the work, instead of a landing page for Getting Started.

fixes Qiskit/qiskit#84

* circuit drawing style in Getting Started

begins to address Qiskit/qiskit#98

* adopting the term of art 'quantum cloud services'

* getting_started references wrong circuit drawing PNG file

Fixes Qiskit/qiskit#129

docs/getting_started.rst

@@ -291,7 +291,7 @@ backend.
     #drawing the circuit
     qc.draw(output='mpl')
 
-.. image:: images/figures/getting_started_with_qiskit_circuit_0.png
+.. image:: images/figures/getting_started_with_qiskit_circuit_1.png