allows to fetch all density features without for all slices
also takes an optional logic_name argument

for example fetch_all_by_Slice(slice) will return all seq_region_attrib for a given slice
now, fetch_all_by_Slice() will return all seq_region_attrib for all slices

Only use the coordinates with the smaller seq_region_id (usually 1-22,X,Y) to avoid mapping the LRG to the patch region

The new function takes an analysis_id and a job status as parameters.

should not project for other sources

removed pig-specific hacks

only project from HGNC if species is human, from MGI if species is mouse

only used for Rfam and miRBase sources

Adding a no_error flag to allow for simple single value querying where the number of rows returned could be ambigious

Go through an object and make sure everything is populated once we go through a call of $gene->load().

given two databases of the same species, compares the xrefs used for gene display to describe the statistics of what has changed between databases

Applied wait constraints to all three calls. Could have refactored, but the system calls are fiddly and I'll probably make more mistakes that way.

Added a queue waiting command to prevent e.g. Human and Mouse projecting simultaneously when Mouse relies upon Human to be complete and correct.