Update py-fparser and py-psyclone versions

[rupertford]

The versions of fparser and psyclone are out-of-date in spack. The latest versions need to be added.

[rupertford]

Created branch py-fparser-release-0.0.10. Despite its name it also updates PSyclone to 1.8.1.

[rupertford]

The main problem is that the config file is not found when installed via spack. I need to find out if we can set environment variables from spack.

There is also a slight issue with enum34, which PSyclone depends on. If Python3.6 is used then having enum34 loaded in spack causes errors. I wonder whether I need to only load enum34 when <Python3.6. By default it looks like 3.5.x is loaded with PSyclone and fparser but now and again when I mess about and subsequently load fparser (but not psyclone) I get errors and it seems to be trying to use 3.6 libraries. I don't know how to reproduce this.