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Changed an 'our' global variable to ENV{EHIVE_ROOT_DIR} to allow API-only users to set it and work as usual

bugfix: make sure users' tweaking of Data::Dumper::Maxdepth does not mess up stringify()' s operation

Utils/Config.pm no longer depends on ENSEMBL_CVS_ROOT_DIR, which becomes non-essential for non-EnsEMBL applications.

cosmetic: added short summary of Git commits between 23.Apr-14.Jun'2013 to Changelog for CVS-only users

PostgreSQL: connection parameters are now supplied on the command line (no need to set PG variables by hand)

given -job_id Scheduler should take the Analysis into account and only submit a Worker for this Analysis

Adding foreign keys to PostgreSQL schema by reusing the MySQL file (the syntax happens to be exactly the same!)

Has one known limitation (always INSERTs instead of INSERT_IGNORE and REPLACE) and may contain other bugs.

Slow the example down a bit and allow 2 Workers. In "-can_specialize 1" mode the two Workers will complete the whole pipeline.

setting "-hive_force_init 1" will cause init_pipeline.pl to drop the database prior to creation (use with care!)

added support for stringification/destringification of accumulated values (an element is allowed to be a complex structure)

now supports sleeping for a floating point seconds; take_time can be given by a runtime-computed formula such as "1+rand(1)/1000"

Simplified logic to decide whether Scheduler needs a resync. Temporarily ignore limiters and look at the number of workers initially required.

Trigger re-sync when sum_over_preferred_analyses(num_required_workers)==0.
Trigger check-for-dead if valley->count_running_workers!=queen->count_running_workers.

finally implemented LSF's version of count_running_workers() and a Valley aggregator for all visible meadows

(currently they repeat a cycle of "wait t=1 sec, refresh stats" n=5 times,
maybe both of these parameters could be tuned better in future)