Adds feauture "db and user creation".

  * added types and providers:
      mongodb_database
      mongodb_user
  * added db.pp public definition
  * added password hashing function
  * rspec tests for new resources
  * updated README.md

Change-Id: I15bee67da8d45006bf22f56522c93f0bf70cde3d
Adds mongo startup wrapper and Ruby 1.8.7 fix.

  * fixed test mongodb_user_spec.rb
  * added mongo startup wrapper in providers

Change-Id: Ieff8486eea7f573ab2a1efc046e51b4c399d08c7
Prefer hashed passwords instead of plain text

  * added 'password_hash' param for mongo::db
  * updated README.md
  * added test

Change-Id: Iebd226c44ca7d26a981457c9801ae79a949f684f
Adds 'tries' param and roles sorting.

  * added 'tries' param for mongo::db, mongodb_user, mongodb_database
  * added roles sorting for 'mongodb_user'
  * updated README.md
  * added tests

Change-Id: I5101b2c7071ff0e1490dfe5d93989fe614e3e591
Fix typo in README.md

Change-Id: I2cb3ef8682d58aefba6d4e8ef7ec36db45a6194d
Merge pull request #70 from rsokolkov/feature/master/user_db_creation

Adds feature "db and user creation".