make entry access simpler [#4]

Installing git on host machine is necessary for users to use git-bash.
But github account should not be mandatory.

It's mandatory to teraciers, but not to everyone. This will make the entry access simpler.
Import postgresql version 3.0.2
Import openssl version 1.0.2
make entry access simpler [#4]

Format README, the line lenght must not exceed 100 characters, no tab chracters are allowed
make entry access simpler [#4]

Download zip if git is not available
make entry access simpler [#4]

*unix -> *nix
Merge remote-tracking branch 'hoatle/enhance_4_simpler_entry_access' into develop
Import nginx version 1.7.0
Import ohai version 1.1.10
Merge branch 'master' into develop
make entry access simpler [#4]
Format README, the line lenght must not exceed 100 characters, no tab chracters are allowed
ssh keys configuration for virtual machine [#8]

This is the proposed solution:

1. To use ssh keys on the virtual machine, you must configure the use of ssh from
``Vagrantfile``: replace ``"ssh" => false`` by ``"ssh" => true``.

2. Use existing ssh keys: ``id_rsa`` and ``id_rsa.pub`` from *cookbooks/teracy-dev/files/default*
will be always copied into the virtual machine each time of login into the virtual machine. This
mechanism is used to make sure you can always have updated ssh keys into the virtual machine. Just
put files there, and you're done after ``$ vagrant ssh`` again.

3. If you don't want to use existing ssh keys (means that no id_rsa and id_rsa.pub in the cookbook),
then ``$ vagrant ssh`` will ask you to create ssh keys right after login. You need to use default
key name (id_rsa). These are new generated keys. So to use for ssh access, you must provide this
new public key to ssh servers (add public key to github, bitbucket accounts).
These new generated keys will be also copied into *cookbooks/teracy-dev/files/default*. When the
virtual machine is ``destroy`` and ``up`` again, it will be copied into ``./ssh`` directory of the
virtual machine again as described in step 2 above.
ssh keys configuration for virtual machine [#8]

Remove annoying trailing whitespace, add requirements for getting started

fix: ssh => false by default
ssh keys configuration for virtual machine [#8]

Rewrite ssh keys section to make it simpler, shorter and easier to understand
ssh keys configuration for virtual machine [#8]

Fix bug
Merge remote-tracking branch 'hoatle/feature_8_ssh_keys_configuration_virtual_machine' into develop