Added escaping to keyspace name in Client#switch_keyspace
add spec for escaping keyspace during auto-switch
[ci skip] update CHANGELOG
Merge pull request #34 from datastax/RUBY-44

RUBY-44
[RUBY-45] add address resolution policy
[ci skip] documentation fixes
[ci skip] break up long line
[ccm] update submodule
rename identity address resolution policy to none
add multi-region address resolution spec
[ci skip] add address resolution diagrams
[ci skip] explain default address resolution policy behavior
[ci skip] update address resolution doc
Merge pull request #35 from datastax/RUBY-45

[RUBY-45] add address resolution policy
fix validation error constructors
first pass of error features
read and write timeout errors
updated writetimeout
more tests
more tests