Minor spelling fix
Fixing a broken bullet list
Correct capitalization of "NumPy"
Add cross references to `NumPy`and `SciPy`
Another minor spelling fix
Merge pull request #172 from JensRantil/adding_cross_references

Adding cross references
Merge pull request #169 from JensRantil/minor_spelling_fix

Minor spelling fix
Merge pull request #171 from JensRantil/fix_broken_bullet_list

Fixing a broken bullet list
Add code example to demonstrate proper string concatenation.

The text does a good job of explaining which route to take when
concatenating strings, but the mention of "join" might mean nothing to
beginners without a concrete example.
Merge pull request #173 from kylerob/concat-example

Add code example to demonstrate proper string concatenation.
Improve upon string concatenation section.
Merge pull request #175 from sigmavirus24/master

Add two more examples to the structure section
Adding nested unpacking
Adding a bit about returning values
Merge pull request #176 from guibog/master

A bit on returning values and nested unpacking
remove deprecated flag
Merge pull request #177 from epequeno/virtualenv

remove deprecated flag
module naming
minor editing
add stub