Updated title for clarity.
Edited single-file tutorial title and first paragraph for claritiy.
clarify; capitalize word
add missing word; add missing link
add some separation
no need to duplicate what can be referenced
some PEP-8 fixes

* stdlib imports appear first
* top-level functions separated with 2 blank lines
* limit line length to 79 characters
use a context manager so that it does resource cleanups for us
counting starts from zero
no need for strong language
Take advantage of 'literalinclude' and 'lines' directive

This results in less duplication
Merge pull request #10 from tshepang/improve

various improvements to Pyramid Single File Tasks Tutorial
thank you
Merge pull request #8 from tshepang/clarify

clarify; capitalize word
thank you
remove ununsed glossary
update copyright year, and keep it updated
no need to guide Sphinx to do syntax highlighting for Python code snippets
Merge pull request #13 from tshepang/lang

no need to guide Sphinx to do syntax highlighting for Python code
update url
Merge pull request #14 from tshepang/url

update url
make example links clickable, for convenience