deleted library folders
Squashed 'references/bi/' content from commit 806b6bc

git-subtree-dir: references/bi
git-subtree-split: 806b6bcc4bf69eee0200a396b995498f60f7da80
Merge commit '6e2145734f4233c12ec03b4fd5254246d17099c0' as 'references/bi'
Squashed 'references/core/' content from commit 67f1a90

git-subtree-dir: references/core
git-subtree-split: 67f1a90a31bb908d444d00c640eb8b9f07f7b402
Merge commit 'ba362a801c81d04f562cf12f298c1239e71731d5' as 'references/core'
Squashed 'references/dal/' content from commit 6ba9094

git-subtree-dir: references/dal
git-subtree-split: 6ba9094368f6d6b29038e88b1336644555146c71
Merge commit '15cc75e1384192bcdb2a32c9edc53fe818d188c4' as 'references/dal'
Squashed 'references/platform/' content from commit f7e9864

git-subtree-dir: references/platform
git-subtree-split: f7e98647780712e162cc2bdb049816be6626b398
Merge commit 'd533e14268d4d0083078ff6b7c723079ae7e09d8' as 'references/platform'
re-added library projects