Oasislmf

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* Added correlated run feature to Gulcalc
* Added fmcalc allocation rule 2 and 3
* 54 - fmcalc allocrule 2 - final losses can be set to zero if prior level losses are zero
* 57 - Footprint to csv for specific event
* 80 - add support for back-allocation of multi-level layers
* 84 - pltcalc output whitespace
* 86 - first event_id is dropped using summarycalc -i

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* fix usage of zip file in getmodel
* fix periods file in aalcalc
* fix summarycalc error message
* ensure item\_ids are contigious in itemstobin
* add alloc rule 3

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* fix to reduce Gulcalc memory footprint size

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* Fixes to CMake build
* Added validation tools
* Fix for compressed footprint filenames
* fix bug handle loss is zero
* Fix fmcalc for missing samples
* Removed aalcalc check for weights sum to 1.00

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* Fix and binary build for OSX
* Added check in occurrence data
* Fix for exitcode
* Fix a fmcalc seg fault
* Added support for CMake builds

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* New loss stream type for gulcalc added
* Fix item stream processing
* Added support for back allocation to gulcalc
* Made fm and gulcalc streams symmetric