Update 02-developing-apps-with-liferay-ide.markdown

Added some text to the header on our three paths for getting Liferay IDE tools on top of Eclipse IDE.  Moved the bundled option to the top (as this is the most straightforward approach for new developers.
Update 02-developing-apps-with-liferay-ide.markdown

Added comments around starting the server
Update 02-developing-apps-with-liferay-ide.markdown

Corrected the folder location for preference setting.  Was 'Window', should read 'Eclipse'
Wordsmithing.
Merge branch 'pr-79'