Add releng component for building with buckminster

This enables mirroring of the p2.site using p2 actions from buckminster
This file also contians extra dependencies needed to build the bundles in this repo
Updates bundle versions to 2.6.1
Feature version set to 2.6.1
Update to OPSIN 1.5.0

Sovles bug 3542
Replace / with _ in search result folder for pubchem wizard

This solves the immediate problem of folders not
being created

Solves bug 3546
Removed method that appears unused

I see no reason for this being in the wizard page
Also it opens the possibility for bad code and could
cause OSGi class loading issue if used
Added unit tests for the OPSIN manager
Include the OPSIN unit tests in the test feature (as run on Jenkins)
Merge pull request #33 from egonw/feature/opsinTestSuite

OPSIN manager test suite
Make manager member non static
Change from log4j to slf4j
If reader accepts Molecule.class send in a IMolecule

instead of an IAtomContianer
Aromaticity detection uses atom type information, not bond orders
Makes the SMILES parser to preserve aromaticity.
Wait for file creation before continue for appendSDF test

Hack to make the test pass.
Resource check when testing file operation should be built in to our test framework.
Also adds more information when testBug3394 fails
Make use of SilenChemObjectBuilder 

instead of DefaultChemObjectBuilder
Unregister listener when disposed

Should solve bug 3547
Makes chemspider require version 1.1.1 of org.apache.commons.logging

to force it to use the slf4j version
Adds ability to be adapted to ImageDescriptor
Replace equals and adds hash code

The molecules should be equal if they have the same CID
Both methods are generated by eclipse