Split folder description into sources vs releases

For greater comprehension, splitting the description of 
what is in each folder into two groups:
* sources - the raw contents that feed into final bosh releases
* releases - the references and credentials for final bosh releases
Updated the login server to 1.2.1

Shortlog
598d127 Bumped the version of the login server to 1.2.1
d1a4a28 [cfid-453] [cfid-668] Re-organize links on UI
78d17f8 [cfid-578] change /approvals URL to /profile
cb8c1f7 [cfid-669] Add ldap profile and test case for context
f1c5d3a Remove vmc headers to prevent duplicates
d0b830e [cfid-669] Add UsernamePasswordExtractingAuthenticationManager
e493ba1 Update pom to post-release snapshot version
gemfile for the required minimum CLI gems

A gemfile is the easiest way to install and ensure usage
of the correct CLI gems; especially since 1.5.0.pre.473
is now required to create releases (which requires an
additional gem source).
Merge pull request #70 from drnic/patch-1

Split folder description into sources vs releases
Bump src/gorouter:

Alex Suraci and Maria Shaldibina (2):
      when nats goes away, do not unregister routes
      don't spawn a goroutine for establishing NATS
Re-add micro job.
Remove micro job. Will re-add when fixed.
Merge pull request #75 from drnic/gemfile

gemfile for the required minimum CLI gems
Merge pull request #72 from joeldsa/login_server_1.2.1

Updated the login server to 1.2.1
BP & TH
ascii art welcome to v2; interactive delete of old folders
Bump src/gorouter:

Alex Suraci and Maria Shaldibina (2):
      Update Readme to reflect NATS connection lost condition
      reset stale tracker state when it becomes stale
Update lucid64 rootfs to include libicu-dev
Bump src/health_manager_next:

Gregg Van Hove and Max Brunsfeld (5):
      Don't try to restart instances when nats is unavailable
      Refactor integration helpers
      Remove debugging print statements
      Resubscribe to messages when NATS comes back up
      Remove unneeded integration test
Merge pull request #74 from drnic/cleanup_v1_on_upgrade

./update - clean out old v1 files that aren't removed from "git pull"
Bump src/cloud_controller_ng:

David Sabeti and Tim Labeeuw (2):
      Refactor/Add HM_Respondent tests
      Copes with HM sending incorrect stop commands [fixes #48374009]

Matthew Boedicker and Max Brunsfeld (2):
      Mark apps as having failed to stage [#48212825]
      Fix description in instances API spec

Phan Le and Ryan Tang (1):
      Return a meaningful message when space guid is invalid in create service requests.
Bump services

Jeff Schnitzer and Matt Royal (2):
      Update mysql gateway to use newest vcap-service-base
      Add integration test for deleting mysql database instances

Jesse Zhang and Phan Le (5):
      Added edition extra information to plans
      formatting
      Integration test for Sendgrid
      make integration tests less flaky
      Addon plans only looking for pricing in USD
Bump src/services:

Jesse Zhang and Matt Royal (2):
      functional tests for Service.with_extra_info
      Improve JsonHttpClient and add correct Provider to extra fields
Merge branch 'master' of https://github.com/cloudfoundry/cf-release
Used use_nginx flag.