Move INSTALL, LICENSE, README, THANKS and TODO into root directory

diff --git a/source/CHANGES b/CHANGES
similarity index 100%
rename from source/CHANGES
rename to CHANGES

diff --git a/source/INSTALL b/INSTALL
similarity index 100%
rename from source/INSTALL
rename to INSTALL

diff --git a/source/LICENSE b/LICENSE
similarity index 100%
rename from source/LICENSE
rename to LICENSE

diff --git a/source/README b/README
similarity index 100%
rename from source/README
rename to README

diff --git a/source/THANKS b/THANKS
similarity index 100%
rename from source/THANKS
rename to THANKS

diff --git a/source/TODO b/TODO
similarity index 100%
rename from source/TODO
rename to TODO