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LAST BUILD ON BRANCH ffc-fixes

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• ffc-fixes
• master
• refactor_sim_factory
• 1m_history_bugfix
• history_support_daily_input
• fix_history_columnar_assignment
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• tutorial3
• Order-In-Init-Error
• verbose-invalid-transform
• verbose-order-init-error
• fix_dividend_boundary_conditions
• refactor_algo_simulator
• dividend_table
• portfolio-init-error
• moved-perf-tracker-assignment
• fix_3317
• v0.7.0
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• fixed-zero-last-sale-price
• remove_unused_algorithm_methods
• broker_order_statuses
• talib_optional
• log-history-update-failure
• welcome-to-the-family
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• exception-on-nan-order-value
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• history-cleanup-rebase
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• remove_deprecated_method
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• pandas_update
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• bug_5089
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• pr/416
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• v0.8.0rc1
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• use-loggers
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• cache-treasury-curves-as-dataframe
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• use-memory-views-for-risk-calc
• remove-dependency-on-intraday-risk-metrics
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• do_not_modify_security_lists_directory
• minor_zipline_path_fix
• remove-event-count
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• remove-repetitive-type-checking
• order-target-update
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• stop-record-changing-results
• group-events
• remove-bar-count-source
• 579
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• call-algo-initialize-after-init
• use-filename-as-symbol
• add-security-fields
• remove-position-proxy
• root-symbol
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• remove-identifier-caching
• cleanup-asset-tests
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• futures-knowledge-date
• avoid-dt-index-on-risk-update
• futures-api
• remove-noopy-asset-finder-test
• fix-get-datetime
• add-multiplesymbols-extras
• add-multiplesymbols-extra
• use-symbol-lookup-in-algo
• remove-extra-metadata-pass
• prevent-duplicate-dividends
• use-notice-date
• upgrade_nose_parameterized
• asset-finder-backed-by-db
• asset-finder-backed-by-db-2
• remove-string-is-checks
• improve-risk-update-speed
• static-symbol-lookup
• fixes-for-asset-finder-integration
• asset-db-writer
• ffc-api-rebase
• dividend-payout-timing
• remove-unused-property
• asset-db-writer-legacy
• futures-auto-close
• lookup-future-chain-nat
• more-ffc-fixes
• sane-setup
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• clarify-assets-test
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• fix-minute-bar-siblings
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BUG: Use normed last_close instead of period_end.

`period_end` can be outside the range of data for which we have dates.
`last_close` properly gets pulled back to the last date for which we
actually have data.

We should consider whether or not we need to be storing period_end at
all.