Moved gitless installer into its own file.

install.sh

@@ -1,21 +1,16 @@
 #!/bin/bash
 
-# an alternative URL that could be used: https://github.com/creationix/nvm/tarball/master
-TARBALL_URL="https://api.github.com/repos/creationix/nvm/tarball"
 NVM_TARGET="$HOME/.nvm"
 
 if [ -d "$NVM_TARGET" ]; then
   echo "=> NVM is already installed in $NVM_TARGET, trying to update"
-  rm -rf "$NVM_TARGET"
+  echo -ne "\r=> "
+  cd $NVM_TARGET && git pull
+  exit
 fi
 
-# Downloading to $NVM_TARGET
-mkdir "$NVM_TARGET"
-pushd "$NVM_TARGET" > /dev/null
-echo -ne "=> "
-curl --silent -L "$TARBALL_URL" | tar -xz --strip-components=1 || exit 1
-echo -n Downloaded
-popd > /dev/null
+# Cloning to $NVM_TARGET
+git clone https://github.com/creationix/nvm.git $NVM_TARGET
 
 echo
 
@@ -48,7 +43,7 @@ fi
 
 if ! grep -qc 'nvm.sh' $PROFILE; then
   echo "=> Appending source string to $PROFILE"
-  echo "" >> "$PROFILE"
+  echo "\n" >> "$PROFILE"
   echo $SOURCE_STR >> "$PROFILE"
 else
   echo "=> Source string already in $PROFILE"