Make sure value of tree is propagated correctly to commands.
normalize paths in help output
Merge pull request #209 from Tieske/help_output

normalize paths in help output
updated default system tree location to 'program files', so it is protected with admin rights.
Implemented a /SELFCONTAINED installation option that makes a single directory installation
specify error exitcodes, specifically 'permission denied'.
updated comments for exitcodes
batch wrapper script (luarocks.bat) updated to auto-elevate if permission was denied
Merge pull request #211 from Tieske/exitcodes

Win defaults, /SELFCONTAINED option
some textual updates
Merge pull request #212 from Tieske/text_fix

some textual updates
Licensing cleanup
Merge branch 'master' of github.com:keplerproject/luarocks
Fix: Purge command did not check permission for the tree to operate on
Merge pull request #214 from Tieske/purge_permission

Fix: Purge command did not check permission for the tree to operate on
Improvements to the write_rockspec command.
Let's make this more and more automagical over time. :)
Merge branch 'master' of github.com:keplerproject/luarocks
Add help on --deps-mode
Merge branch 'master' into luarocks-doc

Conflicts:
	src/luarocks/command_line.lua