Add Table::timestamp_pos (useful to output a table with timestamp feature)
Remove ostreamTable taking OTable and ITable (unnecessarily complicated)
Add timestamp feature support in ostreamTableHeader
Remove Table::add_features_from_file, extremly slow and not that useful
Implement ostream timestamp feature Table
Fix ostreamTable to support timestamp feature
Add test units for ostreamTable with timestamp features
Fix Table::update_pos (used to update target and timestamp pos while filtering)
Add UTest for filtering with target and timestamp features
Remove now useless (in practive at least) force feature user option
Add option for timestamp feature in eval-table
Fix force features implementation
Minor whitespace clean up
Fix force feature in feature selection
Remove force features because forcing unloaded features is not supported anymore
Rename ignore-enfore-target-dataset.csv to timestamp-dataset.csv
Rename ignore_enforce_target_table to timestamp_table
Remove redundant code + indentation clean up
Add random + timestamp feature selection test
Merge pull request #1045 from ngeiswei/improve_table_timestamp_feature_support

Improve table timestamp feature support