removed library folders
Squashed 'references/bi/' content from commit 2dbcdf0

git-subtree-dir: references/bi
git-subtree-split: 2dbcdf01cca138b9cb36f49db2f41267b4fba5f3
Merge commit '0d7c18fe3c623859be853fa099fa8ec60d512ea1' as 'references/bi'
Squashed 'references/core/' content from commit 186ce0d

git-subtree-dir: references/core
git-subtree-split: 186ce0d5d7f05e917d22de6edb8806aa6c1a03b7
Merge commit '56668d7d90d6c246692d8fef54523f32320be236' as 'references/core'
Squashed 'references/dal/' content from commit 1219662

git-subtree-dir: references/dal
git-subtree-split: 1219662a434557d903d640b3b26f7f47562f992d
Merge commit 'a625bc44c038fcaa67fc9f1e7daa3b83f2b77901' as 'references/dal'
Squashed 'references/platform/' content from commit 2a02682

git-subtree-dir: references/platform
git-subtree-split: 2a02682dfd907ce4603ae7be699d1957465a781f
Merge commit '01d18875898d21745d5071cdb2529d8d93c46b0d' as 'references/platform'
re-added library projects