robot now displays some log when initialized.

issue-29 client: robot now tries to reopen STT WS on error

Closes #29

See merge request !25

client: Hublot no longer record itself

Closes #30

See merge request !24

Refactored `recordParticipant` in order to extract two independent functions for
getting a STT WS and recording the user stream.

On STT WS error, try to get a new STT WS for the user.

STT lib mock is now extracted into a separate object for cleaner handling.

Previously hublot would record and try to transcribe it own media stream. Add
check to avoid this.

Add the `getMyId` function to the controller in order for hublot to know its own
participant Id.

The build time has been reduced,
and the Dockerfile now respects the best practices.

Add the script xvfb-chromium
Change start.sh to launch xvfb-chromium, and export the right value of DISPLAY
Change also the base image of the Dockerfile (node:8-strecht)

Add the "webdriver-manager update ...." command.

webdriver-manager:12.0.6 is now in the dependencies.

The base image is now node:8 (and no more node:8-alpine).
Changed the way Java 8 is installed.
Install other packages (chromium, xvfb, libgconf-2-4).

The tmp directory is now directly created in the webdriver-start script.

Node version has been changed to 8-alpine because Java 8 was not available in node:7.10

hublot now uses fake media sources

Closes #28

See merge request !23

hublot now uses fake media sources for its audio and video.

The project now provides facilities to launch a standalone selenium server from
the project root.

Issue 23

Closes #23 and #24

See merge request !22

Robot will now stop recording and close websocket when a participant leaves the
room.

robot now checks for participants that have already joined the room and record
them on start.

There was a (non-problematic) typo in `should start transcribing stream on user
connection after start` test in `robot.test`.

Fixed it.

implement reco behavior

Closes #15

See merge request !21

robot now displays reco. as chat messages

The client controller now exposes a function to send a chat message via hublin.

Add base64-encoded avatar of hublot

client: define and implement libReco

Closes #3 and #13

See merge request !20

Extract keywords and propose recommendation links based on transcription segments which are sent by the participants

Allow chromium to access insecure content. This is required for now as not all
external services expose secured endpoints.

This should not cause a problem in practice, but is still bad. We should ensure
that this will not be needed in the future.

See issue #22.

fix external lib loading issue

Closes #21

See merge request !18

The external libs would not get loaded before running the behavior functions
that required them.

Move loading function call and add timeout to force them to get loaded before
robot start.

client: add libArchive feature

Closes #4 and #14

See merge request !17

robot now initialize lib.archive on start

Add client lib to archive transcripts of meetings.

Fixes some issues with project setup

Closes #19 and #20

See merge request !15