Merge branch 'master' of github.com:Tieske/luarocks into win_install_checkpath
fixes LR install in location with spaces, quoting LR commands
NOTE: seems to be broken now, bug not found yet
update get_md5() and check_md5() to also return an error message if it fails
unquoted arguments of get_md5 command to prevent failure, needs further updating
Merge branch 'master' of https://github.com/keplerproject/luarocks into command_quoting
fixed double quotes in io.popen commands
Merge branch 'master' of https://github.com/keplerproject/luarocks into command_quoting
fixes permission checks on Windows with VirtualStore redirection
removed unintended code
Merge pull request #189 from Tieske/fix_permission_check

Fix permission check
Merge branch 'master' of https://github.com/keplerproject/luarocks into command_quoting
Merge pull request #183 from Tieske/command_quoting

Command quoting for paths with spaces on windows
The installer will automatically request admin priviledges to allow proper installation in protected locations. A new switch /NOADMIN is added to explicitly prevent this, and allow installation in unprotected locations when the user doesn't have admin rights.
Merge pull request #190 from Tieske/adminrights_installer

Admin rights for Windows installer
simplified priviledge test on Windows
Merge pull request #191 from Tieske/refactor_priv

simplified priviledge test on Windows
refactored debug output. Now all is set by using `verbose = true` in the config file instead of manually uncommenting code.
Also moved to platform independent code, from Windows only
Merge pull request #192 from Tieske/debug_output

Improved debug/verbose output
If PowerShell is not available, a proper message is now displayed when installing on Windows without admin priviledges
Merge pull request #193 from Tieske/no_powershell

Windows; remove powershell requirement
Windows installer required /P argument to be first or would overwrite other values
cleanup temp batch file in case of elevation