added PagedIndex based on InvertedIndex
added page_size option for planop CreateIndex
added PagedIndexScan planOp
improved PagedIndex
added debug timing outputs to PagedIndexScan and SimpleTableScan
mid-term presentation state
merged CreateIndex.cpp namespace issues
switch index and createIndex to use valueId instead of value
switched index from map to vector
added MergeStoreIndexAwareBaseline which rebuilds index on every merge
fix issues from cherry-picking process