updated target platform

it didn't seem to resolve anymore...

Change-Id: Ib15f95541077417a800238a86a707a26f909ecae
Updated target platform to Xtext 2.6.2

Change-Id: Idd2229e3f6ddbac07be7b12dc9192ed5294f7787
Updated Xtext 2.6.2 in pom

Change-Id: I6ae2af176fb765b55efa835d7369cdcd9b691def
Adapter target platform to new Xtext update site layout

Change-Id: I93b97dc5447f19d2cede006b2e2603c4818676d5
maven launches

Change-Id: I6d51b4e168d4836ba25499893046e9d0b03fbc75
fixed m2e launch configurations

Change-Id: I274305dcb2037dc2dfb55e06f217b7dd752c0fbe
launch configuration for DISPLAY=:50

Change-Id: I9212bedd7ea6c628c8d3c87caba002295088b115
avoid mwe and mwe2 from target platform

They are resolved anyway as dependencies

Change-Id: Ief791efe72b163dea93b8b5d9f7183f3a4d09b02
added aggregator file

Change-Id: I7e11815cb0abf6d64b6c48a890e09c97fe361da8