Ldap sync time option

Related to #147

/cc @sytse @jacobvosmaer @job

See merge request !155

Different message when no result is returned on ldap group query

Fixes #103

/cc @sytse @jacobvosmaer @job

See merge request !156

EE feature steps documentation

Fixes #139

/cc @sytse @jacobvosmaer @job

See merge request !154

Packages for 7.2.0-ee

See merge request !153

Fix admin emails unsubscribe

Fixes #151

See merge request !152

Protect unsubscribe path

See merge request !1033

Backticks cause quote

See merge request !704

Swap is required on servers with 1GB RAM

See merge request !1032

Bump required gitlab-shell version to 1.9.7

See merge request !1031

Add installing cmake to 7.2 update docs

See merge request !1029

Add dependency info for mysql-postgresql converter

upgrade ruby and gitlab shell config during 6.0->7.1 & 6.0->7.2 upgrades

Explain label migration

See merge request !1025

Update changelog

Fixes #1509

See merge request !1026

cmake is required during the installation of the rugged gem

Running converter with Python 2.6.x installed gives the following error:
AttributeError: 'module' object has no attribute 'check_output'

After installing Python 2.7.x everything works fine.

Update changelog

Fixes #146

See merge request !149

Fix spelling error in merge request performance issue warning.