Strain object

Addition of million mutation strains causes certain strains to never load
* Remove fetching of all Variations contained to display genotype
* link to variations in genotype via search now
* remove functions for the removed tags: Reference_strain and Males
* fix #695 (only overview widget. will still break in Contains)
RNAi object sequence display
* sometimes fetching PCR_product instead of Sequence
* fix #825
Fix page titles
* don't display username unless you're in 'My WormBase'
Page redirect - invalid classes
* redirect to search if user trying to access page with an invalid class
RNAi sequence
Add sequence of the associated PCR_product to the RNAi page if Sequence
and DNA_text tags are empty.
* fix #825
RNAi sequence work
* get sequence from multiple PCR_products
* #825
* revamped and expanded the display of anatomy function data for phenotypes
* requested by: K. Yook.
* refers to #922
Made some notes for transposon and pseudogene changes for WS237

Updated init script and the staging configuration file
Turned off the bumping for RNASeq features; not sure this satisfies request in #733
Disabled caching entirely on the staging instance.

* set in wormbase_staging.conf - now OFF by default
Merge branch 'staging' of github.com:WormBase/website into staging
Tracked down and fixed a problem with displaying B. malayi sequences.

The problem was puzzling but the fix was embarrasingly easy.

closes #879 when merged to master.
Break out endogenous transposons to their own track (#876);
Partial support for new variation tracks (#663).
RNAi sequence
* use headers
* #825
Added new aggreagtgors for new tRNA source/method pairs.

Aggregation should now work (see: C02B4.t2 for example).

Closes #779
Merge branch 'staging' of github.com:WormBase/website into staging
Removed some obsolete aggregators.

Note: this also closes #35 (I had read the wrong issue number
from the issue TITLE which I think dates to bitbucket)
fixed the aggregation of ncRNAs and clarified there descriptions

* closes #76
Merge pull request #933 from WormBase/staging

Bringing staging over