Make detection of a mismatch in the C and Fortran integers an error, since in that case we cannot build a correct Fortran interface

Handle the case of a Fortran compiler that has reals and double precision the same size (e.g., g59 with the -r8 switch)

changed top-level configure to make MPI_THREAD_FUNNELED the max thread level for channels which do not specify one

removed implicit null from spawnargvf.f and spawnmultf.f tests because the old sparc compilers don't have a declaration for iargc()

Added barriers in between different iterations to make sure that leaf nodes don't send data to the root faster than it can receive.

fixed improperly declared variables in test programs.  A variable called aint would be declared in an .h file, but the test program assumed the variable would be called asize, and v.v.  Implicit none was added to all programs/subroutines/functions to catch any such errors in the future.

If the user specifies any CFLAGS, append our default optimizations to it, instead of replacing our optimizations.

Bugfix for shm and ssm channels.  Added missing read and write memory barriers for x86, and missing volatile in packet structure

1) Spawned processes inherit working directory from spawner if the spawner does not specify it explicitly in MPI_Info

Enable -O2 optimization by default. This optimizes, gcc, intel, Portland, Sun and Absoft compilers. More optimization flags might need to be added for other compilers.

nemesis: fixed hang bug in nemesis progress engine.  Added code in blocking receive progress to check whether network module completed a request.

Due to potential blocking of MPIDI_PG_GetConnString() the state of VC is now *_CONNECTING in MPIDU_Sock_connect(). Queueing requests when VC is in *_CONNECTING state. Changing state of VC to *_CONNECTING before invoking MPIDU_Sock_connect() from within ssm