index syntax is duplicated

in http://orientdb.com/docs/master/Indexes.html and http://orientdb.com/docs/master/SQL-Create-Index.html

one of the two uses 'property' the other '(prop-names)' - the first is not that clear on the fact that you can have multiple properties

furthermore, both miss the [COLLATE ] clause

to handle using 'include' command in doc, if possible, so that the same text is loaded into different pages if needed, and can be easily updated from one single file

Also both pages contain examples - which is confusing as some may be in one page and some other in the other page - to aggregate them

http://orientdb.com/docs/master/Indexes.html also includes java code (?) which should be moved into the corresponding chapter related to java