Add a conventions document.

This will contain the style guide (once it's written) and presently
contains the beginnings of a standard example network. The diagram still
needs some work, but all of the important machines are present.
Added entry for Domain Specific Language, and glossary link
Add definition for CLI
Minor grammar changes
This covers one sub section - TCP vs UDP. It contains a description of where the two protocols are the same and different. Examples include their usage, difference in their protocols, and header size.

Added myself as a contributor.
Update package_management_101.rst
Update identity_management.rst: Content

Some blurbs about Active Directory & LDAP. I apologize if the build
fails again, but I'm having some trouble getting sphinx working.
Merge pull request #123 from dhutty/master

Correct some misspellings and the like. Minor rewordings.
Merge branch 'topic/apeiron/example-network' of https://github.com/apeiron/curriculum into apeiron-topic/apeiron/example-network
Adds the conventions doc to an index to pass, and adds a link from contributions page
whitespace
adds a todo for @apeiron on topography
workaround for problems with graphviz 2.26.3. not DRY, but passes build
Merge branch 'patch-1' of https://github.com/elacheche/curriculum into elacheche-patch-1

Conflicts:
	package_management_101.rst
Address @ronna's comment on purge option
Formatting Changes

Fixed the links and bulleted lists. Successfully ran make HTML with 0
warnings or errors.
Introduce mounting, fstab, autofs

Introduces the mount command and some of its options. Takes apart
an /etc/fstab file. Briefly introduces autofs and an
/etc/auto.master file. Autofs has a bit too many prerequisites to
be meaningfully covered here, but it is at least introduced with
an example, and discusses the chain of events during an automount.
cleaning up soft_skills_101/201 and backups
TCP vs UDP Subsection - Rewrite #1.
Merge pull request #122 from nibalizer/mount_fstab_autofs

Introduce mounting, fstab, autofs