Create pipeline.md
Update config.xml

Linked the new pipeline docs.
Fixed the loading on non-lowercase content files on case sensitive platforms
Merge pull request #2749 from Nezz/androidcontentfix

Fixed the loading on non-lowercase content files on case sensitive platforms
Update config.xml

Fixed ids to match title names.
Added pipeline image.
Update pipeline.md

Added image and features list.
Update config.xml

Added images to build.
Update content_intro.md

Added link to using pipeline tool docs.
Adding some images for the pipeline doc.
Merge branch 'pipelinedocs' of github.com:SickheadGames/MonoGame into pipelinedocs
Create using_pipeline_tool.md

First rough pass at pipeline tool guide.
Added pipeline import image.
Merge branch 'pipelinedocs' of github.com:SickheadGames/MonoGame into pipelinedocs
Update config.xml

Added sing_pipeline_tool.md to topic tree.
Update config.xml

Bad char.
Update using_pipeline_tool.md

Added info about including content via wildcards.
Update config.xml

Fixed typo.
Update using_pipeline_tool.md

Added info about project settings and adding content.
Adding more pipeline images.