species ID must be from NCBI Taxonomy DB
rename "species" to "ncbi_taxon_id"
Setting up repository with copies of the UCSC schemas.
Link official accession to GAReferenceSequence
Adding documentation describing the design of the schema, which is an optimized version of the scheme we detail in the paper.
Updating comments, shortening length fields
Simplifying away the two different ways of refering to endpoints.
Update and rename referenceHierarchy.avdl to referenceAlignments.avdl

Sorry to hijack this file, I'm proposing to generalise it to represent alignments, with two possible constructs - the alignment block and a cigar alignment. The alignment block is a pairwise structure that matches intervals between two blocks, and can be placed in an array to describe a pairwise alignment. The second alignment structure is a CIGAR based alignment that apes the basic CIGAR format, with the difference that the alignment is between to paths in two sequence graphs.
Update referenceAlignments.avdl

Fixing typos.
Update referenceAlignments.avdl

Simplifying to just represent cigars
Update referenceAlignments.avdl

Adding in alignment from sequence to sequence graph.
Cleaned up array fields in avro schema.
Merge pull request #29 from fnothaft/null-array

Cleaned up array fields in avro schema.
change endOffset to be one beyond the last base

change definition of endOffset so that endOffset-startOffset is length (if all within one block)
and you can iterate while (i < endOffset).  This is natural in 0-based coordinate systems, 
avoiding +1 or -1 calculations on lengths.
Update ga4gh.avdl
updated style guide for comments
Merge branch 'contribution_documentation' into alt_method_definitions
Merge pull request #1 from ga4gh/master

sync changes from ga4gh to dglazer
Update and rename methods.avdl to readmethods.avdl
Update and rename ga4gh.avdl to reads.avdl