Improvements to files.

+ Updated Readme
+ Latest version of idrislang.sty
+ Add clean target to examples Makefile
Code deduplication.

Consolidated example code from examples/ and in chapters:

+ starting.tex
+ typesfuns.tex
Updated .gitignore to stop pesky binary builds.
Fixed typo's, urls, and layout.
Code deduplication, and listing stylings.

+ Removed code duplication between `modules.tex` and `examples/`
+ Added a `stdout` style in `conf.ltx` for all non-code listings.
+ Made listings Float where applicable.
Fixed typos and overfull boxes
Fixed code duplication.
Merge branch 'master' into dev and fixed typos

Conflicts:
	content/interactive.tex