Memory management fixes

Fix memory allocations via ALLOCATE, FREE and RESIZE words
Fix tests
Assorted other fixes

General TERMIOS support

General TERMIOS support now available via TERMIOSSTRING word

Improved makefiles

Improved makefiles and a man file

Conway's Game of Life

Curses support now allows Conway's Game of Life to be played.

1.0 - full support for float words

Riscyforth moves to release 1.0 with full support for float words (as 64 bit IEEE754) in the float module.

Full Changelog: 0.7...v1.0

Maturing Float support

Support for 64 bit floating point is now quite mature

Fix for Double release

Merge pull request #9 from mcmenaminadrian/dynamic

Fix directory issue

Double

Full implementation of optional DOUBLE word set from the Forth 2012 standard.

Modules support

It's now possible to extend Riscyforth via dynamically loaded modules.