message: Spell corrections in main README
diff: @@ -97,7 +97,7 @@ Northstar containers can be created with the Northstar utility
  ### Processes
  -Started Northstar contains are Linux processes. The attributes and environment
  +Started Northstar containers are Linux processes. The attributes and environment
  for a spawned container is described in a container manifest which is included
  in a NPK. The container manifest allows to configure the following Linux
  subsystems and features:
  @@ -141,7 +141,7 @@ Install build dependencies on Debian based distributions by running
  sudo apt-get install build-essential libclang1 squashfs-tools
  ```
  -The `squashfs-tools` are required in version **4.5** or higher.
  +The `squashfs-tools` package is required in version **4.5** or higher.
  Northstar comes with a set of [examples](./examples) that demonstrate most of
  the Northstar features. Building the example binaries and packing its
  @@ -258,16 +258,16 @@ is used to configure a device mapper verity devices that is mounted instead of
  the contained Squashfs image.
  Repositories without a `key` are treated as trustful sources. No signature
  -checks are performed. The root filesystems are mounted *without* verity. A
  +checks are performed. The root filesystem is mounted *without* verity. A
  possibly present verity root hash with in the NPK is ignored. Trusted
  -repositories are should on verified and read only file systems.
  +repositories should be verified and read only file systems.
  Set the `mount_on_start` flag of a `fs` repository to `true` to make the runtime
  mount *all* containers present at startup. The mount operations are done in
  parallel.
  -The `mem` repositories uses
  -[memfd](https://man7.org/linux/man-pages/man2/memfd_create.2.html) for it's
  +The `mem` type repositories use
  +[memfd](https://man7.org/linux/man-pages/man2/memfd_create.2.html) for their
  storage. No data is persistently stored during an installation of a container.
  Obviously it's not possible to have NPK's preinstalled in a `mem` repository at
  runtime startup. The `mem` repositories are mainly used for testing.
  @@ -477,7 +477,8 @@ repository.
  Just a few guidelines to remember before you ask a question:
  * Ensure your question hasn't already been answered. If it has been answered but
  - do es not satisfy you, feel free to comment in the issue and we will re-open it.
  + the answer does not satisfy you, feel free to comment in the issue and we
  + will re-open it.
  * Use a succinct title and description. Add as *much* information as possible e.g
  manifests, npks, applications...
  * If your question has already been asked and answered adequately, please add a
  