Full support for legacy CQL2 tables

* Correctly read schema for legacy tables
* Correctly rename default column names to defined column names when
  synchronizing
* Expose `compact_storage` directive in Cequel::Record
Merge pull request #44 from cequel/legacy-tables

Full support for legacy CQL2 tables
Bump version
Fixes for legacy schema support

* Internally represent legacy clustering column as `:column1` and legacy data
  column as `:data`, to be consistent with CQL3 internal representation
* Cast `value_alias` to a symbol
Merge pull request #47 from cequel/legacy-fixes

Fixes for legacy schema support
:data -> :value