AtIO returns a reference to IO or throws an exception since IO must
exists
Similar to C++ STL containers at function

Identify the bp version in buffer

Moved Variable start from 1 to 0

Modified tests for allowing stepping read mode
Made PerformPuts and PerformGets optional

Moved to sync functions
Added exception in EndStep if Perform Puts/Gets is missing

Remove Single variable or attribute
Remove all variables or attributes

If IO object to be used.
InquireIO returns nullptr if DeclareIO not called.
Two calls to DeclareIO with the same name will throw an exception

Modifying file names

Tweak cmake functions to properly interpret evpath_config output.  Tweak include position to avoid reordering.

To do: understand blocks per step at write for string

Resolving long ambiguity
Correcting APPLE MACROS

Need to test, right now not working

Need to add examples and tests
Fixed some bugs in Attribute Read

Working on Fortran examples
Testing Row Major Reader
Debugging parallel read
Changed file open function
Added initial tests 1D and 2D