THRIFT-153. Proper handling of strings with escapes (in IDL)

- Recognize and parse escape characters in .thrift files.
- Escape strings used as constants in generated source files.


git-svn-id: https://svn.apache.org/repos/asf/incubator/thrift/trunk@758922 13f79535-47bb-0310-9956-ffa450edef68
16 files changed