Provide build instructions

Provide a site page similar to [1] with detailed instructions on how to build Syncope with various profiles, more or less as already reported [2].

Moreover, rename console's 'dev' profile to 'debug' and enable JPDA debug (as done fore core).

[1] http://cxf.apache.org/building.html
[2] http://markmail.org/message/nofcdfhtueeiknpx