apply aggregation pipeline for ps_analysis
analysis do not write any results to _input.json
ln run.dir instead of run.dir.join('*')
refactoring: comments and data format of analysis#input_files
update spec
a trivial refactoring
update document for analysis about analysis#input
a trivial refactoring
refactoring
a trivial refactoring
Merge pull request #256 from crest-cassia/improve_analyzer_performance_when_the_number_of_runs_are_large

Improve analyzer performance when the number of runs are large