minor changes to NEB doc pages and examples

Implement workaround for NVCC incompatibilities with OpenMP directives

Updates for USER-INTEL package and NEB command flags/docs updates and issues

Refactor Dump and Irregular classes to remove static class members

this version eliminates the need for the PBCconnected list and avoids having to access the spec_atom array for ghost atoms

protect all OpenMP pragmas with ifdefs and add special conditions for nvcc to ignore unsupported directives

removed are:
- DOS/Windows text format carriage return characters (^M)
- tabs replaced with spaces (tabs are evil!!)
- trailing whitespace

-DLMP_USE_LIBC_QSORT will use qsort() from libc to sort (requires static/global variables).
-DLMP_USE_MERGE_SORT will use a plain merge sort. slightly slower for expensive comparisons.
-DLMP_USE_HYBRID_SORT will use hybrid merge sort. faster than merge sort (no static/global variables)

recover running USER-DPD with USER-OMP and suffixes

- use insertion sort to pre-sort data in 32-element chunks
- swap pointers between merge runs instead of copying the data

Refactor ring communication to no longer require static class variables

Bugfix in AIREBO as reported in #59 by @KammIma

Collected small changes

This reverts commit 06612300.

Affiliation Update for USER-CGDNA

Added compute_scalar to fix_grem

Implemented pair style vashishta in GPU package

Refactoring of USER-TALLY computes to handle sparse/hybrid system for many processors plus bugfixes

Refactor and bugfix for some TIP4P pair styles