Check x-ref-modified in Get Block
Merge branch 'master' into get_block_xrefmodified
update: readme.md

Include instructions for copying over config files 
from the deuce repo before starting up deuce-server
fix: validate port in configspec - integer
Merge branch 'master' into get_block_xrefmodified
Merge pull request #160 from TheSriram/fix_config_spec

fix: validate port in configspec - integer
fix: cassandra config.ini

-  the db_module for cassandra should be 'cassandra' and not
   'cassandra.cluster', since thats being imported in cassandra metadata
   driver

-  cluster is configured as a list now, instead of a string.
Merge branch 'master' into enhancement_ref_modified
Merge pull request #163 from TheSriram/cassandra_config

fix: cassandra config.ini
fix: cassandra metadata driver blocksize

Cast blocksize to integer.
The reference driver of sqlite has the same implementation.
fix: transport errors while using markers, offset

These errors were brought into the picture, when testing with the
cassandra metadata driver.

- The offsets were being cast to int, but not being explicitly passed down
  to the metadata layer.
- Falcon sets the return of req.get_param() to None automatically, if the
  param is not present.
Merge pull request #132 from BenjamenMeyer/enhancement_ref_modified

Enhancement X-Ref-Modified
comments: Add comments about req.get_param

Per Xuan's Suggestions, comments now are added explaining that
falcon would return None, if it cant find a parameter.
Merge pull request #134 from jc7998/get_block_xrefmodified

Get block xrefmodified
Merge pull request #165 from TheSriram/transport_fixes

Cassandra and Transport fixes
Merge branch 'master' into enhancement_ref_modified