LRDOCS-1485 Include modified MD files' intro files when running dist-diffs target
Remove images from incorrect dir. I re-added these images to the correct dir previously, but these old ones were not removed
Minor IDE link updates
Merge branch 'add-intros-diffs' of https://github.com/codyhoag/liferay-docs into dist-diffs-intro
Merge pull request #1092 from codyhoag/update-ide-and-links

One more minor correction for LP Reorg
Merge pull request #1093 from jhinkey/dist-diffs-intro

Update dist-diffs target to accompany all imported articles with intro* files
Update GitCompare and DistDiffTask classes to support added dir for learning paths
Merge pull request #1094 from codyhoag/update-git-compare

Update GitCompare and DistDiffTask classes to support added dir for lear...
Added concat-markdown task and target for book preparation.
Updated images; added missing class.
Replaced image.
Added screenshot for new portlet wizard.
Minor fixes and updated screenshots.
Images renumbered.