Updated the .classpath for BEAM 0.3

Change-Id: I59cb1bf7a6eafde505fb3d488dba5250c3d16f1c
Use the RingSearch instead of the SpanningTree

Change-Id: I21cce5c9ca58a54a9a327d99849a79b364f78bb4
Signed-off-by: John May <john.wilkinsonmay@gmail.com>
The ring info is not really being used anymore, so removed it

Change-Id: I48b5082f1103be5af523ae0109f1e83f061c02c0
Signed-off-by: John May <john.wilkinsonmay@gmail.com>
try-catch substituted by @test(expected=InvalidSmilesException) in SmilesParserTest.java (= junior task 16).

Signed-off-by: John May <john.wilkinsonmay@gmail.com>