i18n: Add Catalan translation
i18n: Add Catalan language to enum and modify pom.xml to use Spanish userguide
doc: Update AUTHORS file info about new Catalan translator
Add method getAuthenticationType() to avoid problems in edit window

Due to change in commit f5d99cdb8261cda897699533d10a89225cfd3ee8 the method
UserCRUDController.getAuthenticationType() was removed and it was still being
used in _editUser.zul.
Bug #1528: Fix field TaskElement.notes in MySQL.

FEA: ItEr76S04BugFixing
Use EffortDuration.zero() properly instead of more complex alternatives.
Prevent losing precision in TaskElementAdapter.calculateLimitDateByHours()

FEA: ItEr76S04BugFixing
Simplify code of WorkReportServiceREST using beforeSaving method
Add new method to delete a work report from the web service

FEA: ItEr77S06AllowDeleteWorkReports
Add method to remove a work report line from the web service

FEA: ItEr77S06AllowDeleteWorkReports
Update web services documentation with information about the new delete services

FEA: ItEr77S06AllowDeleteWorkReports
Rename monthly timesheets to personal timesheets in the UI

FEA: ItEr77S07PersonalTimesheetsPeriodictyConfiguration
Update name of personal timesheets work report type

Add Liquibase change to update the name

FEA: ItEr77S07PersonalTimesheetsPeriodictyConfiguration
Add new field in Configuration class to store the timesheets periodicity

* Add new field personalTimesheetsPeriodicity in Configuration
* Configure Hibernate mapping
* Create new enum PersonalTimesheetsPeriodicityEnum
* Configure Liquibase changelog to add the new column

FEA: ItEr77S07PersonalTimesheetsPeriodictyConfiguration
Add option to set personal timesheets periodicity in configuration window

FEA: ItEr77S07PersonalTimesheetsPeriodictyConfiguration
Disable personal timesheets periodicity in configuration window if any personal timesheet was already saved

FEA: ItEr77S07PersonalTimesheetsPeriodictyConfiguration
doc: Fix typo "value gained" is "earned value"

FEA: ItEr77S03Community
Modify the list of personal timehseets depending on the periodicity

* Change the string to represent a personal timesheet depending on preiodicity
  too

FEA: ItEr77S07PersonalTimesheetsPeriodictyConfiguration
Refactoring code moving to methods in PersonalTimesheetsPeriodicityEnum

FEA: ItEr77S07PersonalTimesheetsPeriodictyConfiguration
Change the basic methods related to personal timesheets to take into account the periodicity

FEA: ItEr77S07PersonalTimesheetsPeriodictyConfiguration