LRDOCS-450 Updated Liferay IDE installation section with Eclipse Juno information and URLs; wordsmithed the introduction and installation sections
LRDOCS-450 Removed reference to the nightly builds since they are going away soon and the existing nightlies are broken and not going to be fixed. Removed word 'yet' since there are no plans for LR IDE 5.2.x support
LRDOCS-450 wrap Eclipse link text on separate lines