redmine_git_hosting version 0.7.2

* redmine_plugin_views_revisions not used anymore -> removed
* patched post-receive hook because it is using SSLv3 only -> TLSv1
* moved system ruby install to gitolite role
renamed groups, split group_vars, set hostname

* group redmine_server -> redmine (same as role)
* group git_server -> gitolite
* split all.example, one file for each role
* set hostname to testredmine
redmine_dsmf final version 1.4.8
added bash history PgUp / PgDown mapping
don't install nginx twice
add redmine language setting for default data
nginx.conf was created twice, removed some ignores

* config_*.yml.j2 files are not ignored anymore
* config_production.yml.j2 added with default sendmail config
* don't ignore group vars (so branches can commit them easily without changing .gitignore)
optionally install nullmailer, README details about customization