Added updated HCA template spreadsheet

Added updated HCA template spreadsheet with the following schema changes
Added EGA and dbGAP accession to Project Tab
Added Analysis File and Analysis Protocol Tabs
Added File_source to Analysis File tab
Added Matrix_Cell_Count to Analysis File Tab
Added Derivation_process and data_normalization_method to Analysis Protocol tab 

See schema change PR here: HumanCellAtlas/metadata-schema#1371