Minor syntax fix in privacy policy template
Made settings_value template tag globally accessible

The settings_value tag introduced in 7b2a6a1a7f5afaee414943dce4ed170844c306f6 seems useful enough
that it should be readily available in any template, without having
to explicitly load a template tag module.
Moved ADMINS setting to secretsettings.py

There's no concrete reason that this belongs in secret settings,
but placing it there allows us to dynamically change it without
having to add the main settings.py file to .gitignore.
Removed request.META.SERVER_ADMIN call in privacy policy template

This is a valid thing to include, but, ideally, the server's
administrator should be added to the ADMINS list in rmgweb's
secret settings file (moved there in 3ba343e933ffcee06816c7d0f9342ca7a5e1e1f2) for consistency and
to prevent possible redundancy.
Renamed global.py to universal.py

Avoids clash with python's `global` keyword (something I definitely
should have caught when I created this file...)
Modified access to settings.ADMINS in privacy policy

The settings_value template tag is certainly useful in other cases,
but here it makes working with individual elements of the returned
array quite difficult. Passing the array from the view allows for
much simpler forloop manipulation of the `admins` context variable.
Minor fix to kinetics NIST-grabbing

If queryNIST encounters an issue in pulling an entry, it returns
a string describing the issue to be displayed to the user. In such
a case, this fix prevents the view from trying to access this
string's reference.url attribute (as, of course, it has none).
Tidied up rendering of kinetics for math displays and plotting.

Stop duplicating entry number in plot tooltips.
Cleaned up legend rendering in plots.
Allows for plotting of reactions w diff units on same plot.
Added module for plotting forward and reverse kinetics.

Use a chemkin file containing thermo and reaction kinetics along
with RMG dictionary to generate plots of both forward and reverse
kinetics along with associated chemkin strings.

Future features:
- Capability to specify pressure when plotting pressure-dependent kinetics
- Make RMG dictionary optional
- Thermo plots from chemkin data
Fix to prevent moleculeToURL from destroying reaction templates

Previously, labeled atoms were cleared from each molecule when
viewing an entry, causing database entries to be modified upon
saving an entry. This will hopefully prevent such errors in the
future, and past modifications will be fixed through a
comprehensive rebase.
Fixed adjacency list tooltips
Tweak to hide empty rule depositories
Added doi to reference display
Push changes automatically to remote git branch after database entry is changed.

Create and checkout new branch in RMG-database folder.  Whenever database commits
are made,they are pushed to that remote branch.  We can periodically check and
merge the remote branch into master.
Output both rate rules and group additivity estimates during a kinetics search.
Generate entry pages for either group additive or rate rules estimated rxns.

Changed reaction URL template to reflect pages for either group additivity
or rate rule estimated entries.
Changed diff model to reflect fix in @b209dc5
Avoid referencing entry_string variable before assignment.
Allow for plotting of kinetics without mandatory RMG Dictionary file.
Changed references to MultiNASA to be NASA.

This reflects the renaming of the MultiNASA class to NASA (and NASA to
NASAPolynomial) in RMG-Py.