Implemented put_block and exported options

Implemented features:

• Added support for put_block in Blob.
• Added support for filter in Blob::list. Now you can filter the blobs to find specifying the starting string.
• Added support for timeout in Blob::list.
• Added support for timeout, prefix and max_results in Container::list.
• Added support for max_results in Container::list. Now you can limit how many containers could be returned by a single call.
• Added support for next_marker in Container::list. Now you can continue enumerating your containers in subsequent calls.

Refactoring:

• Moved Container::list options in a separate structure (azure::storage::container::ListContainerOptions).
• Moved Blob::put_page options in a separate structure (azure::storage::blob::PutPageOptions).

Bugfixes:

• Corrected the format bug in azure::core::range::Range and azure::core::range::ba512_range::BA512Range. Previously the string returned was
  formatted as {}/{} which is invalid for the x-ms-range header. Now the format is bytes={}-{} as expected. I still need to figure out if
  I need to change the FromStr trait too to match the change.

Removed methods:

• Removed ListBlobOptions::new as it was just useless boilerplate.

put and clear page, max_results and next_marker in Blob::list, refactoring

Implemented features:

• Added support for max_results in list_blobs. Now you can limit how many blobs could be returned by a single call.
• Added support for next_marker in list_blobs. Now you can continue enumerating your blobs in subsequent calls.
• Added put page for page blobs.
• Added clear page for page blobs.

Refactoring:

• Added page constraints (512-bytes aligned).
• Most methods moved from storage::Client to correct structs (ie storage::container::Container and storage::blob::Blob).
• Moved list_blobs options in a separate structure (azure::storage::blob::ListBlobOptions).

list blobs, get blob, put blob

Implemented features:

• List blobs
• Get blob
• Put blob

create container, delete container

Implemented features:

• Create container
• Delete container

shared key authentication, list containers

Implemented features:

• Shared key authentication
• List containers