Nbodykit

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* :issue:`495`: Improve scaling of LogNormal catalog
* :issue:`497`: take method to BinnedStatistic
* :issue:`498`: add compute method to Catalog interface; CatalogMesh no longer a Catalog
* :issue:`500`: unique binning in FFTPower and FFTCorr
* :issue:`503`: redistributing a catalog spatially
* :issue:`504`: Catalog.copy hangs
* :issue:`505`: update docrep to 0.2.3
* :issue:`506`: compatible with dask 0.18.1.

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* :issue:`491`: update compatibility with pandas 0.23.0 in cgm.
* :issue:`490`: write more useful weights and pairs in the paircount result.
* :issue:`493,494`: update for deprecation in pmesh

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* :issue:`475`: proper normalization of the Landy-Szalay estimator, included R1R2 option and to_xil function
* :issue:`487`: Linear theory correspondant of nbody simulation. (three fluid model)
* :issue:`486`: overdecomposition in FOF
* :issue:`483`: switching to a new type in BinnedStatistics.copy()
* :issue:`482`: Fix a crash when two datasets passed into corrfunc are of different dtypes.
* :issue:`480`: BigFileCatalog shall look for header relative to the root of file.
* :issue:`479`: GatherArray allows root=Ellipsis (for allbather)
* :issue:`476`: Fix MeshSource.apply if MeshSource.action is overriden
* :issue:`471`: Decompose of surveydata to the correct bounds.

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* :issue:`468`: corrfunc and big-endian floating point numbers
* :issue:`470`: Add hankel tranforms for ell>0
* :issue:`469`: Fix a regression painting 'apply'ed meshes.

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* :issue:`439`: added updated pair counter algorithms, SurveyDataPairCount and SimulationBoxPairCount.
* :issue:`439`: added correlation function algorithms, SurveyData2PCF and SimulationBox2PCF
* :issue:`441`: add a DemoHaloCatalog for tutorials that downloads small halo catalogs using Halotools
* :issue:`441`: add hod module with wrapper classes for Halotools models and create HOD catalog by calling the populate() method of a HaloCatalog
* :issue:`445`: add a global cache with fixed size for dask calculations
* :issue:`446`: fixes future warning generated by pandas
* :issue:`447`: adds PCS sampling windows

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* :issue:`442`: bug fix: fixes MemoryError when data is larger than memory in paint(); adds `paint_chunk_size` default option
* :issue:`440`: Selection, Value, Weight specified as "default" columns; default columns are not saved to disk
* :issue:`437`: bug fix: make sure to copy attributes of catalog when copy() is called
* :issue:`436`: FFT-based correlation function algorithm, FFTCorr addded
* :issue:`435`: binder badge added to README and documentation for cookbook recipes
* :issue:`433`: by default, the header file will be found automatically in Bigfile
* :issue:`429,432`: updates to documentation
* :issue:`430`: fix bug in FOF due to stricter numpy casting rules in numpy 1.13.3
* :issue:`428`: fixes bug in painting normalization when using interlacing is used
* :issue:`422`: proper list of attributes/methods added to documentation of Cosmology class
* :issue:`425`: latex requirement removed from ``notebook.mplstyle`` style file
* :issue:`423`: support for Gadget 1 file format