BGData 2.1.0

Add chunkedMap() function.
Improve error handling in chunkedMap() and chunkedApply().
summarize(): Improve performance.
GWAS(): Improve performance of rayOLS method.
GWAS(): Fix bug when computing p-values for methods other than rayOLS, lsfit, or SKAT when i is used to subset samples.
GWAS(): Fix wrong results in lsfit method when covariates with missing values are used.
as.BGData(): Fix bug loading .fam and .bim files when path contains the word bed.

BGData 2.0.0

Change chunking strategy to improve parallelism: instead of loading a subset of chunkSize in the main process, load a subset of chunkSize in the each fork. That way nTasks is not necessary anymore and the same code can be used for one core and multiple cores.
Add findRelated() function for use with matrices and symDMatrix objects.
Add orderedMerge() function that allows for phenotypes to be easily merged into a BGData object.
Performance improvements in getG() function: use single shared memory matrix to collect results.
Performance improvements in rayOLS method in GWAS() function.
getG_symDMatrix(): Support version 2 of symDMatrix package.
getG_symDMatrix(): Add chunkSize parameter.
getG_symDMatrix(): Add minVar parameter.
as.BGData(): Use rownames of BEDMatrix object as rownames for pheno, and colnames of BEDMatrix object as rownames for map.
Include process ID in verbose output if nCores > 1.

getG_symDMatrix(): Fix scaling error when scale = FALSE.
getG_symDMatrix(): Compute block indices correctly for out-of-order, non-sequential indices.
getG_symDMatrix(): Do not include centers and scales in attributes anymore because the influence of j and minVar is difficult to retain.

Initial release.