upd .gitignore and README

.gitignore

@@ -1,6 +1,5 @@
 *.txt
 dist/
-tests/helpers/*
 src/backups/
 src/clean
 NOTE.todo

README

@@ -10,19 +10,17 @@ INSTALLATION
     Uninstall:
         make prefix=$HOME/.local uninstall
 
-DEVELOPMENT
+TESTING
 
-    TESTING
-
-    BB uses amazing test suite: https://bats-core.readthedocs.io/
+    boring_backup uses amazing test suite: https://bats-core.readthedocs.io/
 
     Install Bats:
         git clone https://github.com/bats-core/bats-core.git
         bash bats-core/install.sh ~/.local
 
     Add some Bats extensions:
-        git clone https://github.com/bats-core/bats-assert.git tests/helpers/bats-assert
-        git clone https://github.com/bats-core/bats-support.git tests/helpers/bats-support
+        git submodule add https://github.com/bats-core/bats-assert.git tests/helpers/bats-assert
+        git submodule add https://github.com/bats-core/bats-support.git tests/helpers/bats-support
 
     Run tests:
         make test