Added positional parameters
Merge remote-tracking branch 'origin/master'
Merge remote-tracking branch 'upstream/master'
Made unsetting of variables possible again

Before, unsetting a variable would result in "nil" in the environment :/
Merge pull request #130 from Wobbo/master

Added positional parameters groundwork
mostly memory consumption optimization of built-in stuff: moved serialization code to extra module so they only get loaded when necessary, drastically reduced memory consumption of component proxies, moved advanced shell stuff (redirects, pipes, variable expansion) to an extra program (besh.lua) to reduce memory footprint of shell module; shell uses $PS1 for the prompt now
Merge branch 'master' of https://github.com/MightyPirates/OpenComputers
fixed os.setenv
make man also look for files ending with .man
added PAGER env var and using it in man
moved text wrapping to utility method in text module; properly wrapping text in more now; fixed rendering bug in term.read
Merge branch 'master' of https://github.com/MightyPirates/OpenComputers into MC1.7

Conflicts:
	src/main/resources/mcmod.info