Moved `bem-core` to v1
Added `bemxjst` tech
Added `bemxjst-old` tech
Updated `bemhtml` tech: extend of `bemxjst`
Added `bemhtml-old` tech
Added `bemtree` tech
Added `bemtree-old` tech
Added doc for `bemxjst` tech
Added doc for `bemxjst-old` tech
Added doc for `bemtree` tech
Added doc for `bemtree-old` tech
Added doc for `bemhtml-old` tech
Updated doc for `bemhtml` tech
Updated README.md