On user creation, warn if the user already exists
Merge branch 'master' into Feature499

Conflicts:
	js/server_privileges.js
Remove trailing white spaces
Make documentation comments compliant with PAER coding standards
Opening parenthesis of a multi-line function call must be the last content on the line
Rename function name according to PEAR standards
PMA_DBI_try_query --> PMA_DBI_tryQuery
PMA_DBI_try_multi_query --> PMA_DBI_tryMultiQuery
PMA_DBI_convert_message --> PMA_DBI_convertMessage
PMA_DBI_get_tables_full --> PMA_DBI_geTablesFull
PMA_DBI_get_tables --> PMA_DBI_getTables
PMA_DBI_get_databases_full --> PMA_DBI_getDatabasesFull
PMA_DBI_get_columns_full --> PMA_DBI_getColumnsFull
PMA_DBI_get_columns_sql --> PMA_DBI_getColumnsSql
PMA_DBI_get_columns --> PMA_DBI_getColumns
PMA_DBI_get_column_names --> PMA_DBI_getColumnNames
PMA_DBI_get_table_indexes_sql --> PMA_DBI_getTableIndexesSql
PMA_DBI_get_variable --> PMA_DBI_getVariable
PMA_DBI_fetch_value --> PMA_DBI_fetchValue
PMA_DBI_fetch_single_row --> PMA_DBI_fetchSingleRow