* Move the CoveredMask reset flag out of the if statement.

* Add user-defined chemistry tolerances.

* Add a Triple flame in Exec/Cases/TripleFlame

* While making new level from coarse, get 1 ghost cell right so that
AmrNewTime data have one ghost cell properly set.

* Add a simple 2D CH4/Air premixed bunsen case. Tested up to 5 levels.

* Add a 3Dversion of the premixed bunsen flame.

* Need to reset the covered cell mask after restart in case regrid is not called right after.

* Add option to restart an efield simulation from a non-efield one.

* When restarting from non-efield chk, initialize electro-neutral nE
field.

* Fix PlotFile to plot I_R(nE) with efield and write/read in phiV/nE in
chk.

* Machinery to restart from non-efield chk.

* Update Precond operator to implement the second approximation of Stilda.

* Make use of the absolute tolerance in MLGMRES.

* Add fillpatch functions for the non-linear state components.

* Enable Schur complement approximation 2.

* Define and ParmParse m_ef_schur_approx.

* Floor nE along with species if required.

* Fix typos in PeleLMBC.cpp

* Update PeleLMeX header for new fillpatch functions.

* Replace mechanism.h by mechanism.H

Adding example mechanism for PLOG evaluation

…anges

My spray multicomponent changes