Update ReadMe with the potential issues and workarounds in ohpc_build

See merge request jpr/ohpc_vagrant!33

Fixed Localhost URL

See merge request jpr/ohpc_vagrant!25

Simple typo issue from "crul" to "curl".

See merge request jpr/ohpc_vagrant!26

* shib yum repo fix to include dependencies
* new rstudio plugin upstream repo for tracking site changes
* update rstudio submit form

Resolve "Cloning the submodule triggers errors from github"

Closes #13

See merge request jpr/ohpc_vagrant!31

The default was to use ssh urls for github which require an account
on github. Switch to the https url for the submodule to simplify
project clones for users without github accounts.

Clarify use of sudo commands to register ood with ohpc warewulf.

* Add role for Rstudio
* Add role for Jupyter with form fixes
* Add role for Shibboleth sso against samltest.id with fixes
* Add RHEL7 software collections support
* Fix easybuild module path

Updated the localhost link mentioned in the file to http://localhost:8080

fixed the .iso download to work on Mac

See merge request jpr/ohpc_vagrant!19

wget is not avilable for Mac by default so used curl.

Add placeholder for selecting centos vagrant box versions

See merge request jpr/ohpc_vagrant!18

Feature enable epel repo before install ansible

See merge request jpr/ohpc_vagrant!17

In order to get newer ansible for rhsm_repository module to work
  need to enable epel repo before install ansible.

Added code to download the ipxe.iso file if missing

See merge request jpr/ohpc_vagrant!15

Copr repo support for custom RPMS
Remove explict slurm patch for 17.11.11 now accessible via copr

Update readme for use with ood

See merge request jpr/ohpc_vagrant!14

Simplify the project cloning instructions
Clarify motivation of project providing links to upstream
Add instructions to create Open OnDemand node

Fix to force the slurm upgrade during provisioning
since it's required for working ood dev cluster
Enhance wwgetfiles to not delay during ood provision.

Get the latest project hash that fixes EB bootstraping
on ohpc master.

* Support use of CentOS maintained Vagrant boxes (kernel and interface name changes)
* Fix broken cluster interactive desktop on OOD due to broken slurm-17.11.10
in OHPC 1.3.6 from November 2018 by replacing with slurm-17.11.11
* Refactor OOD roles to separate one-time setup from ops-like tasks
* Fix compute image support for http proxy port selection (nc)
* Enable EasyBuild install for applications testing

Feat change vagrant box to pristine centos to simplify tracking upstream releases by using upstream maintained vagrant box.

See merge request jpr/ohpc_vagrant!12

Move insert_key directive before VM create to avoid custom key create
Add comments motivating the config choices for ssh config steps
Expand user key authz logic to append key rather than just replace all
existing keys in vagrant user authorized_keys file.

Patch easybuild installation fix

See merge request jpr/ohpc_vagrant!10

Set insert_key to false, prevent vagrant from generating new key
then set our own ssh private key to be used, first priority
finally, copy our own ssh public key into vm as authorized key