Added `sed` and `grep` examples to useful-commands
amended grep description
amended sed and bash descriptions
- mo betta examples

- add `inout` example
- better `optional` example
- Playground issue has been resolved, uncommented `protocol` example
Changed descriptions, added grep, fgrep examples
Adjustments to Style & Content

 Style changes
  - Site format has changed back to ~80 columns, certain rows have had line
    breaks removed.
  - Indentation has been adjusted globally to give additional space and
    consistency.
  - Configuring Tmux has been separated due to long lines causing the entire
    page to scroll horizontally and block text.
  - tmux.conf has been reorganized to better explain settings categorically to
    new users.

 Content Changes
  - Unmapping the prefix key contained erroneous data
  - Misc section and it's contained "bind r source.." setting are superfluous,
    as when this points to the next file to use in the configuration, not the
    current file. Since no additional configuration files have been used, it
    has been removed.
Correct Contributor's list & line spacing

- Contributor's list had an improper character which ruined the formatting.
- The Theme section was preceded by three line breaks rather than two.
Updates to tmux.conf

  Added reloading tmux configuration
Add self as contributor to C++ doc
Remove trailing whitspace from c++.html.markdown
Major overhaul of C++ documentation

- Cleaned up and rephrased comments
- Removed old and erroneous information
- Normalized indentation to four spaces
- Normalized style to "Stroustrup style"
  (http://www.stroustrup.com/bs_faq2.html#layout-style)
- Added a section on references

In the near future I plan on additional sections covering idiomatic
use, such as RAII and C++11 paradigms.
A translation to French for XML
add amd / requirejs tutorial
Corrections

Merci @Oire !
Merge remote-tracking branch 'origin/master' into fr-xml
Minor C++ fixes
octal is eight in Chinese
Merge pull request #807 from zneo/master

octal is 8
Rust tutorial -> The Rust Guide

Previous link is deprecated
Merge pull request #808 from justincampbell/rust-guide

[rust] Rust tutorial -> The Rust Guide