change option prefix tstrajectory to ts_trajecotry

just a typo in comment

create tstrajectory_type visiaulzation

More decreasing visibility of symbols from outside libraries
Also fix a few bugs related to having multiple PETSc libraries

Merge branch 'master' into hongzh/add-checkpointing-support-for-adaptive-ts

create another version of TurnForward() for adaptive time stepping specifically

add test case using adpative time stepping for checkpointing type 'NONE'

add support for adaptive time stepping when saving everything to memory; add suport for event handling for the no_solution_only mode

add a viewer for TSTrajectory

Revert "revolve: c++ compile fix" - as revolve now does not require 'bool' anymore

This reverts commit f46bad4f8dbed07c7fdc4ed466ba9643181c81a9.

revolve: c++ compile fix

fix the warnings attributed to the commits 68bece0 and d40cae4

updates for some changes in master for handling options

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fix offset; fix the corner case when laststridesize is smaller than stridesize

Fix offset calculation; VecView() writes two extra integers to file

polish the code a bit

fix runex20adj_20 wrong results; add some comments

TLTR works for all the four cases like a maigc!

!save_stack mode works for TLTR

save_stack mode works for TLTR

fix RevolveMultiStage; id must strat from 1

refactor two level framework; add second revolve object

change the structs to prepare for two level revolve

fix the problem when compiling petsc without revolve

clean up macros