Implemented undo and redo for the history.
tree3029a0134a7bd2fd35a2261a4ad7cc36530f4af5
-rw-r--r-- 18 .gitignore
-rw-r--r-- 41 AUTHORS
-rw-r--r-- 266 CHANGELOG
-rw-r--r-- 547 CMakeLists.txt
-rw-r--r-- 18009 COPYING
-rw-r--r-- 632 INSTALL
-rw-r--r-- 842 README.markdown
-rw-r--r-- 125 Rakefile
drwxr-xr-x - data
-rwxr-xr-x 72 kaya
drwxr-xr-x - lib
-rw-r--r-- 410 main.rb
drwxr-xr-x - test