Made to call rebar.cmd in Windows

In Windows, rebar executable is rebar.cmd, which does not exist on Linux/Unix, not rebar.
Made to use rebar.cmd if it is there.
Merge pull request #65 from redpine50/make_cygwin

Made to call rebar.cmd in Windows
Cleanup handling of local shell functions

Also add some more documentation about the shell environment.
Update version history for v0.8
Merge branch 'develop'. This is v0.8.
Make lists of positive integers an "atomic" type

This is an experiment to test whether we can have integer lists
strings as an "atomic" type. Should we have list of valid unicode
characters instead?
Make lists of positive integers an "atomic" type in the compiler

This is still an experiment to test whether we can have integer list
strings as an "atomic" type.
Make #' "readmacro" generate #' token
Add shell command (run File) which runs a file of shell commands

This is the first version and will probably need modifying.
Updated version numbers to release values.
Merge branch 'update-version' into develop
Fix bug when printing prompt when node is alive

1 character error!
Copy bin directory on make install
Add new version numbers
Merge branch 'develop' of https://github.com/rvirding/lfe into develop

Conflicts:
	VERSION
	package.exs
	src/lfe.app.src
Updated ignores.
Added initial stdlib project: lfunit.
Replaced tabs with spaces.
Replaced old import with new.
Added support for compiling lib/*.lfe files.