Radical.pilot

- add unit test
- trigger tests
- remove obsolete fifo scheduler (use the ordered scheduler instead)
- add ordered scheduler
- add tiger support
- add ssh access to cheyenne
- cleanup examples
- fix dplace support
- support app specified task sandboxes
- fix pilot statepush over tunnels
- fix titan ve creation, add new static ve
- fix for cheyenne


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- add travis support, test cleanup
- ensure safe bootstrapper termination on faulty installs
- push node_list to mongodb for analytics
- fix default dburl
- fix imports in tests
- remove deprecated special case in bootstrapper


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- work around a pip install problem


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- add issue template
- rename RP_PILOT_SBOX to RP_PILOT_STAGING and expose to tasks
- fix bridges default partition (1816)
- fix 1826
- fix off-by-one error on task state check
- ignore failing DB disconnect
- follow rename of saga-python to radical.saga


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- hotfix: use popen spawner for localhost


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- another fix LSF var expansion


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