Bug fix for BFGS preconditioner

missing CHKERRQs added to eliminate warnings for unused ierr

fix warnigs on arch-opensolaris-misc

"/export/home/petsc/petsc.next-2/src/tao/bound/impls/bnk/bnls.c", line 188: warning: newline not last character in file
"/export/home/petsc/petsc.next-2/src/tao/

fix warnigs on arch-opensolaris-misc

"/export/home/petsc/petsc.next-2/src/tao/bound/impls/bnk/bnls.c", line 188: warning: newline not last character in file
"/export/home/petsc/petsc.next-2/src/tao/bound/impls/bnk/bntr.c", line 226: warning: newline not last character in file
"/export/home/petsc/petsc.next-2/src/tao/bound/impls/bnk/bntl.c", line 257: warning: newline not last character in file

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Memory leaks in MAT_LMVM and TAO_BNK fixed

Documentation update to mark options reserved for developers/advanced users

updated documentation and options with better descriptions of flags

code style fix for if-else

new tests and their output files added to cover new functionality

Fixing an IS related memory leak

More inf/nan checks

Inf/Nan check fixes

Index set bug resolved for when there are no inactive variables left

VecISSet changed to a no-op when the IS is NULL

Code fixes for PETSc standard.

Fixed issue with NULL index sets erroring out on VecISSet

lots of code style changes and bugfixes after review with Todd

BNCG recycling expanded to include the latest Newton step

ready for CUTEst profiling and code review

BNCG updated with the latest active set estimation and Fischer-Braumeister based convergence test

Logic errors in LS fallback and TR loops fixed

Fixed bug in initial trust radius interpolation

Copying of Fortran function handles to embedded TAO debugged

BNCG accelerator added into BNLS, works for TAO examples, segfaults on CUTEst probs

propagated reduced hessian changes into the initial trust radius estimation

LMVM matrix can now deal with reduced systems that change in size based on # of active variables