[WIP] Upload history API

[hexylena]

import_history_from_url works perfectly, from_path is currently failing with some awful galaxy error

 2 bytes in 89 msecs (HTTP/1.1 200) 2 headers in 95 bytes (1 switches on core 1)
Error - <type 'exceptions.UnicodeDecodeError'>: 'utf8' codec can't decode byte 0x8b in position 1: invalid start byte
URL: https://usegalaxy.eu/api/histories
File 'lib/galaxy/web/framework/middleware/error.py', line 239 in __next__
  return next(self.app_iterator)
File 'lib/galaxy/web/framework/middleware/sentry.py', line 40 in __call__
  iterable = self.application(environ, start_response)
File '/usr/local/galaxy/galaxy-dist/.venv/lib/python2.7/site-packages/paste/recursive.py', line 85 in __call__
  return self.application(environ, start_response)
File 'lib/galaxy/web/framework/middleware/statsd.py', line 35 in __call__
  req = self.application(environ, start_response)
File '/usr/local/galaxy/galaxy-dist/.venv/lib/python2.7/site-packages/paste/httpexceptions.py', line 640 in __call__
  return self.application(environ, start_response)
File 'lib/galaxy/web/framework/base.py', line 136 in __call__
  return self.handle_request(environ, start_response)
File 'lib/galaxy/web/framework/base.py', line 192 in handle_request
  trans = self.transaction_factory(environ)
File 'lib/galaxy/web/framework/webapp.py', line 80 in <lambda>
  self.set_transaction_factory(lambda e: self.transaction_chooser(e, galaxy_app, session_cookie))
File 'lib/galaxy/web/framework/webapp.py', line 109 in transaction_chooser
  return GalaxyWebTransaction(environ, galaxy_app, self, session_cookie)
File 'lib/galaxy/web/framework/webapp.py', line 208 in __init__
  self.error_message = self._authenticate_api(session_cookie)
File 'lib/galaxy/web/framework/webapp.py', line 367 in _authenticate_api
  api_key = self.request.params.get('key', None) or self.request.headers.get('x-api-key', None)
File '/usr/local/galaxy/galaxy-dist/.venv/lib/python2.7/site-packages/webob/request.py', line 853 in params
  params = NestedMultiDict(self.GET, self.POST)
File '/usr/local/galaxy/galaxy-dist/.venv/lib/python2.7/site-packages/webob/request.py', line 809 in POST
  vars = MultiDict.from_fieldstorage(fs)
File '/usr/local/galaxy/galaxy-dist/.venv/lib/python2.7/site-packages/webob/multidict.py', line 92 in from_fieldstorage
  obj.add(field.name, decode(value))
File '/usr/local/galaxy/galaxy-dist/.venv/lib/python2.7/site-packages/webob/multidict.py', line 78 in <lambda>
  decode = lambda b: b.decode(charset)
File '/usr/local/galaxy/galaxy-dist/.venv/lib/python2.7/encodings/utf_8.py', line 16 in decode
  return codecs.utf_8_decode(input, errors, True)
UnicodeDecodeError: 'utf8' codec can't decode byte 0x8b in position 1: invalid start byte