Front end redesign

[bestchai]

Redesign front end on AngularJS, Bootstrap and jQuery.

Outstanding todos for this issue:

• Clean-up server.go by using standard Go notation for ignoring return values (underscore _ return arg), adding comments throughout to properly document the logic, and improving error reporting (whenever an error is generated, it's string version should end up on the client-side).

• Remove files from the old server implementation under www/

[Issue created by taaus: 2015-11-27]
[Last updated on bitbucket: 2016-01-14]

[Comment created by carolemieux: 2015-11-28]
Ok, just checking :)

[Comment created by taaus: 2015-11-28]
Yeah I know. I was having difficulties with branches so I recreated the same issue to change the issue number and went on to create a new branch with the new issue number. Sorry for the trouble!

[Comment created by carolemieux: 2015-11-27]
For future reference; if you want to edit something about an issue, you can use the edit command instead of creating a new one.

[Comment created by bestchai: 2016-01-14]
More comments on latest (revision f4b0c670a04c) in the Issue76 branch:

• README file includes the line "Add a comment to this line" in
  multiple places. I think the expectation is for you to fill in a bit
  more details about the dependency -- why it is needed, and how the
  installation proceeds. Doesn't have to be long, but this line has to
  be replaced.

• I made some updated to pushed server.go, make sure to pull/update.

• I first re-formatted server.go -- there is a tool call gofmt that
  you should use prior to pushing any code. My editor (emacs) runs it
  by default whenever I save the file. You can set this up, or run it
  manually or with scripts on the command line. This tool encodes the
  de-factor formatting for Go code.

• Current code in uploadMineHandler func creates numerous err
  variables -- err2, err3, err4. You should have just one error that you
  use (see code above).

• Code in uploadMineHandler has some strange variables names, for
  example fileB. What is that? You should give it a meaningful name.
  Right now it is about as useful as "x". The other vars can also be
  improved -- 'log' is actually 'logContent' and 'out' is actually
  'openedFile' or 'tempFile', etc.

• letterBytes is only used inside RandStringBytes. You should declare
  it in that func. Limit scope to what you need, never more.