New apis

Merge pull request #20 from NikolayS/new_apis

New_apis

Report annoying source=target cases

2.3

Raise exception when source=target in

improved error reporting

• when google responds with "400 bad request", it sends HTML, not JSON. Now it's processed properly

more efficient (2K limit); begin_at/end_at

• new begin_at/end_at config params to control when Google Translate API is called
• much more stable (and correct) google_translate.urlencode() function
• use md5 when indexing google_translate.cache to avoid index key overflow

postgrest-google-translate 1.0

• caching
• multiple phrases in single query
• REST API method (PostgREST) /rpc/google_translate and /rpc/google_translate_array
• if Google Translation API responds with an error, use its message to report in SQL context