Remove double step counting in glee

FIX bug in TSGLEE.

FIX: Issue in TS GLEE get stages

FIX TSAdapt glee error computation and comments in ex31

FIX error in TSAdapt glee and renaming variables

modified TSGetTime error to include an index that indicates when to estimate the error.

fixed warning and added citation for glee

rebasing TS/GLEE to current master

updated interfaces to match the changes in other parts

TS, TSGLEE: added error messages

TS: Created an interface to initialize the time integrator error to a specific value (for restarts)
TSGLEE: Implemented the initialization of the error/auxiliary solution

TS: created interfaces for TSGetAuxSolution, and TSGetTimeError
TSGLEE: Implemented TSGetAuxSolution, and TSGetTimeError, also TSGetSolutionComponents return all r components, not r-1

TSGLEE, TS: Renamed TSGetAuxSolution to TSGetSolutionComponents

TSGLEE: fixed the computing of solution with embedded methods, needed by TSAdapt.

TSGLEE: bugfix in getting auxiliary solution

Adding the first implicit GLEE method based on extrapolated backward Euler

TS,TSGLEE: declared the TSGetAuxSolution in header file, and fixed its implementation for TSGLEE

TSGLEE: moved out the TSGLEE implementation from the explicit directory since it's not purely explicit anymore