fix sith compiler settings in stage_write example
enable passing method initialization arguments in command line for stage_write
Check read method's existence before calling it's functions
cleanup of stuff relating to variable names. i know how to fix the
phantom variables now.
code now appends FPDIM to the start of variables that are internal to
Flexpath.

now the reader side just has to check for FPDIM before copying the
varname into the variable name array that gets returned to the reader code.
phantom variables no longer show up.
updated code to push along group_name information. need to complete
reader side of this.
fixed compilation error.
- add flexpath to libadios_nompi.a
- add adios_internals_mxml.c to libadios_internal_nompi.a only if we build the write part
add flexpath to libadios_nompi.a
added char* method_name to all write/read methods (to be used by utils/list_methods)
Added utils/list_methods, tools to print available write/read methods
adios_config -m prints available methods (supports -r and -s)
added section on 1.7.0 to NEWS
List transform methods as well
.gitignore for utils/list_methods
remove debug lines from adios_config
fix directory name in CMakeLists
Refer to adios_config -m in manual at various places
print all transform methods in list_methods (TODO: print only the working ones)