[Modify] Remove alias of clear
[Add] Add ignore list
[Add][Modify] Classify functions by usage
[Modify] Add date aliases, remove tree alias
[Modify] Add new files to initialize; Bug fix
[Modify] Single quotes to double quotes
[Modify] Move function svn_co
[Modify] Change date aliases into bash environment variables
[Modify] Add ignore file
[Add] Add scripts for svn flow