internationalization finish (error messages and validation msg)

CHANGELOG:
- Change Error Enum to be use in annotation
- reorder test in @CheckPage
- Adding valid flash in dashboard controller (with his own bindingresult)
- Adding translations for errors and validation
- translation works with JQuery
JodaTime implemented & JQueryUI Datepicker

CHANGELOG:
- pom.xml verbose properties changed
- Every Date changed to DateTime
- Adding joda jstl tag for display
- ComputerMapper now uses pattern from ressources with jodatime
- CheckDateValidator now uses jodatime time and pattern
- DateFormatValidator uses jodatime and pattern too
- Change names in ComputerService (getPage -> fillPage, remove -> delete)
- SaveController autowired the computerMapper
- ComputerDaoImpl, refratoring and use of function for same sode
- Fixed wrong error message on checkDate
- Adding patterns and stuff for date in ressources
- Adding JQuery UI Datepicker in form
DataSource & Spring transactions

CHANGELOG:
- most of Dao & service name match "crud"
- remove connectionManager
- Dao and Services : connectionManager replaces with  BoneCPDataSource
- Services : Adding spring transaction
- deleted logback anti-spam file
- datasource-context.xml added to split datasource and app context
removing logDao debug message
Custom page template, taglib for lang  and severals fixes

CHANGELOG:
- pageValidator fix error between pageLimit and total
- Delete do not valid Model anymore
- Adding ErrorController and its jsp
- Adding NotBlank on ComputerDTO
- merge of all ressources i18n
- create taglib in order to switch language and stay on the same page