Use conventional zsh dotfile names

* move rebenv initialization from .zlogin to .zshrc
* rbenv documentation recommends .zshrc
* less files for us to manage in our home directory

* use zshrc instead of zprofile
* zprofile is just an alternative for ksh fans [source](http://zsh.sourceforge.net/Intro/intro_3.html)
* Tim Pope recommends moving /etc/zshenv to /etc/zshrc [source](https://github.com/tpope/vim-rbenv)

mac

@@ -5,7 +5,7 @@ successfully() {
 }
 
 echo "Fix OSX zsh environment bug"
-  successfully sudo mv /etc/{zshenv,zprofile}
+  successfully sudo mv /etc/{zshenv,zshrc}
 
 echo "Checking for SSH key, generating one if it doesn't exist ..."
   [[ -f ~/.ssh/id_rsa.pub ]] || ssh-keygen -t rsa
@@ -65,8 +65,8 @@ echo "Installing watch, used to execute a program periodically and show the outp
 
 echo "Installing rbenv for changing Ruby versions ..."
   successfully brew install rbenv
-  successfully echo 'eval "$(rbenv init -)"' >> ~/.zlogin
-  successfully source ~/.zlogin
+  successfully echo 'eval "$(rbenv init -)"' >> ~/.zshrc
+  successfully source ~/.zshrc
 
 echo "Installing rbenv-gem-rehash so the shell automatically picks up binaries after installing gems with binaries..."
   successfully brew install rbenv-gem-rehash