Unified workflow with empty string and null in setAttributes and setAttribute
 - Added method convertBlankStringIntoNullInAttrValue into AttributesManagerBl
 - Modified methods setAttribute and setAttributes in AttributeManagerEntry
   - convertBlankStringIntoNullInAttrValue convert empty string into null for checkAttributeValue and checkAttributeExists() to unify work with empty string and null
 - Some database are not able to recognize empty string and null. This is the reason why we convert empty string into null in entry.
Description of tables and columns added

- use postgre comments in postgre.sql (-- instead of #)
- Locale columns
- add description for all tables in postgre.sql
- alter tables:
ALTER TABLE pn_receiver ADD locale varchar(512);
ALTER TABLE pn_template DROP COLUMN locale;
ALTER TABLE pn_pool_message DROP COLUMN locale;

-alter destination table: (add propagatio_type)
alter table destinations add propagation_type varchar(10) default 'PARALLEL';
Notification+RPC: new version of nofication module

The notification module is prepared for using. Bugs were fixed and
some features were added, since these are needed for smooth working of
the notification manager. The interface is prepared as command line
tools written in perl in the RPC module. You can find detailed description of
the changes below.

-Features in notification module
 - renamed saving methods to creating methods
 - edited saving and updating methods in NotificationManagerMethod, so as they take an object, not only id
 - added methods for saving relations:
  - saveRegexRelation
  - saveObjectRegexRelation
 - added listing methods
 - added toString methods to entities.
 - formating commit
 - Added new attribute of Receiver - locale
  - the locale of messages is extracted from receiver's locale instead of template's locale
  - the locale from template and pool message entities has been deleted

- Fix of bugs in notifications module
 - fixed parsing of Class from NotifObject - using getName() instead of toString()
 - fixed bug in NotificationsListener: now the processing of perun audit messages is active.
 - Debug fixes:
  - NotificationListener - eddited logger message
  - PerunNotifPoolMessageManagerImpl - fixed possible NullPointerException
  - PerunNotifPoolMessageManagerImpl - add log message in parsing method
  - PerunNotifTemplateManagerImpl - method getTemplateById give most updated template instead the one from cache
  - PerunNotifRegexManagerImpl - method saveTemplateRegexRelation now updates relation in template
  - PerunNotifTemplateManagerImpl - method compileTemplate, fixed name of the template
 - fix of updateTemplateMessage - removed return statement, edited sql statement (BUG_03)
 - enhanced working with locale (BUG_05)
 - update of template-regex relation - the relation between template and regex is now updating template globaly (BUG_10)
 - TemplateRegexRelation managing (BUG_11)
  - repaired cyclic call of saveTemplateRegexRelation and updatePerunNotifTemplate by adding new method assignTemplateToRegex, which is now called from both methods
  - repaired wrong removing TemplateRegexRelation by creating new method removeTemplateFromRegex
  - edited parseMapWithList, so as it doesn't throw unneccessary exceptions
 - removing of AuditMessages - the PerunNotifAuditMessages is now being removed from db, when not recognized (BUG_02)
 - resolved deleting of receiver and template-regex relation - the receiver and template-regex relation has been deleted everytime updatePerunNotifTemplate was called - now this method do not process regexes nor receivers anymore (BUG 04, 06)
 - formatting commit for notification module
 - fixed bug in updateTemplate - now the updatePerunNotifObject updates the notif_trigger too
 - fix of STREAM mode (BUG_13):
  - fix bug of Pool Message row mapper, which was getting the time of creation of the message in a wrong format
  - added log messages connected to STREAM mode
 - fix getting emails from EMAIL_GROUP type of receiver - the email is extracted from attribute of user instead of member
 - repaired updatePerunNotifTemplateMessage - the changes was not propagated to the FreeMaker cache (BUG_15)

- Perl - added Command Line Tools for managing Notification Module
 - created NotificationsAgent
 - perun notification objects:
  - NotifReceiver
  - NotifRegex
  - NotifTemplateMessage
  - NotifTemplate
 - for each is created following tools:
  - create
  - update
  - remove
  - get
  - list
 - for Template-Regex relation is created saving, removing and listing tool
GUI: allow dot in VO shortName
Merge pull request #266 from zlamalp/dot

GUI: allow dot in VO shortName
Merge pull request #260 from zoraseb/table_documentation

Description of tables and columns added
Merge pull request #229 from papperwing/BlankString

Unified workflow with empty string and null in setAttributes and setAttribute
Increase length of shortName by Vo from 16 characters to 32 characters.

- change in createVo method (entry)
- change in updateVo method (entry)
- add test for testing if its allright
Merge pull request #267 from stavamichal/vosShortNameFrom16To32CharsLong

Increase length of shortName by Vo from 16 characters to 32 characters.
GUI: Vo's short name 16 -> 32
Merge pull request #268 from zlamalp/voshortname

GUI: Vo's short name 16 -> 32
Fix method convertEmptyStringIntoNullInAttrValue

- add testing of null value
- also remove System.out printing in attributes tests which failing due to this problem
Merge pull request #269 from stavamichal/fixMethodConvertEmptyStringIntoNullInAttrValue

Fix method convertEmptyStringIntoNullInAttrValue
fix of assignService in ResourcesManagerBl
 - assignService now check required attributes for facility and resource instea of non-empty attributes
Merge pull request #264 from jirmauritz/notification_new

Notification+RPC: new version of nofication module
Merge pull request #270 from papperwing/assignService

Core: fix of assignService in ResourcesManagerBl
Change of long of short_name at VOS

alter table vos modify short_name varchar2(32);
alter table vos alter column short_name type varchar(32);
changes attr_value length from 4000 to 4000 char for all attr_values tables
also change value length for table application_data
Merge pull request #272 from zoraseb/changes_in_db_scripts

Change of long of short_name at VOS
Add new ExtSource for XML.

- create new xml extSource
- reading data from File or from https uri
Merge pull request #273 from stavamichal/newExtSourceForXmlVoms

Add new ExtSource for XML.