Renamed "implantacion" to "Manual de Sistema".

Moved documents on administration below it.
Merge pull request #339 from AlphaGit/proof-reading-doc

Document re-organization
Personal memories Andrés. It is pending of review.
Add Git to personal objectives success
Add Mj Memories to Memorias-de-Proyecto
MJ memories corrections
Project showcase, first approach.

Taken from https://code.google.com/p/io-2012-slides/
Images for CommonJobs presentation.
First step into the product showcase.
Little changes in AM memories
Fix some typos
Other little change in AM memories
Fix typo
Update Memorias-de-Proyecto.markdown
Merge pull request #340 from andresmoschini/am-memories

Memories update
Merge pull request #341 from matias78/MJ-Memories

Add MJ Memories to Memorias-de-Proyecto
Add legacy WebPages version nuget package
Build Docs.Core
Merge pull request #342 from andresmoschini/upgrade-documentation-site

Upgrade documentation site
Some more docuumentation.