Install instructions updates (#171)

* Install instructions updates

* Update README.md

* also need pip

* need to update, plus compact a few things

* add -y

* grammar?

* typos

* Add bountysource link

* consistency

* Point users to the examples dir and wiki

I thought these links were cluttering things a bit, and 2 out of 3 of
them aren’t official documentation yet we’re linking to them in the
first line of the README. I updated the wiki to address these directly
in a way I think is more clear.

* link to Z3 releases

* oops, don't know where that came from

* ensure people run the latest pip

* be more explicit

* Add an Issue Template

* be more explicit

* no longer appropriate here

* unnecessary

* add note about 16.04

* move issue template to hidden folder

* Spelling

* be explicit, makes copy/paste easier

examples/script/count_instructions.py

@@ -1,3 +1,4 @@
+#!/usr/bin/env python
 
 import sys
 from manticore import Manticore

examples/script/introduce_symbolic_bytes.py

@@ -1,3 +1,4 @@
+#!/usr/bin/env python
 
 import sys
 from manticore import Manticore, issymbolic

examples/script/lads-baby-re.py

@@ -1,3 +1,5 @@
+#!/usr/bin/env python
+
 import sys
 
 from manticore import Manticore

examples/script/run_simple.py

@@ -1,3 +1,5 @@
+#!/usr/bin/env python
+
 import sys
 from manticore import Manticore
 

examples/script/state_control.py

@@ -1,3 +1,4 @@
+#!/usr/bin/env python
 
 import sys
 from manticore import Manticore