Merge pull request #210 from zlamalp/registrar

CORE, REGISTRAR: fixed check for similar users when searchString is null
Merge pull request #215 from zlamalp/fix

REGISTRAR: fixed typo in check for similar users
Core: service identity can be group admin

There is no reason why service identities shouldn't be able to get
additional roles in core. Except that we won't be able to get real actor
form audit log for action made by the service identity. That's the risk
that user who give additional role to service identity must take.

This commit only changes behavior of add group admin. Other similar
methods are already accepting service identities.
Merge pull request #225 from zlamalp/pwdreset

GUI: fixed URLs for password reset application
Merge pull request #228 from zlamalp/gui

GUI: fixed password change for service user
Merge pull request #226 from zlamalp/lang

GUI: disabled translation for PerunWeb and PasswordReset
Merge pull request #218 from zlamalp/fixes

GUI: fixed password reset and form styles
Fix empty string in attribute description in ldap

- if description is empty string, work with it like with null
- use in resource and group

(Cherry-pick of 6644819a70aec39db9402450b59050cae2260aa5)

Conflicts:
	perun-ldapc/src/main/java/cz/metacentrum/perun/ldapc/processor/impl/EventProcessorImpl.java
	perun-ldapc/src/main/java/cz/metacentrum/perun/ldapc/processor/impl/LdapConnectorImpl.java
Merge pull request #232 from zlamalp/members

GUI: fixed behavior on member's status change
All changes from 'master' to 'production'