v0.7.9

Full Changelog

• Initial framework for indexeddb-backed crypto store
  #445
• Factor out reEmit to a common module
  #444
• crypto/algorithms/base.js: Convert to es6
  #443
• maySendRedactionForEvent for userId
  #435
• MatrixClient: add getUserId()
  #441
• Run jsdoc on a custom babeling of the source
  #442
• Add in a public api getStoredDevice allowing clients to get a specific
  device
  #439