Ugly hacks to simplify testing for me

This really shouldn't be merged anywhere. This is just the hacks that I use to
build this against an uninstalled copy of xcb-proto and libxcb (I did add a
symlink xcb -> src in libxcb's src directory).

NOT-Signed-off-by: Uli Schlachter <psychon@znc.in>
Import randr_test

Import my randr test application from
https://awesome.naquadah.org/bugs/index.php?getfile=686

Signed-off-by: Uli Schlachter <psychon@znc.in>
Make randr_test more C++-y

Signed-off-by: Uli Schlachter <psychon@znc.in>
randr_test: Use iostreams for output

Signed-off-by: Uli Schlachter <psychon@znc.in>
Use a std::string instead of a char*

Signed-off-by: Uli Schlachter <psychon@znc.in>
randr_test: Convert to std::map instead of own memory management

Signed-off-by: Uli Schlachter <psychon@znc.in>