added clustalw2 to full build environment

- conda packages for clustalw2 from https://biobuilds.org/
  https://anaconda.org/biobuilds/clustalw
- enables more tests for analysis.align to pass
- see issue #898 for discussion

.travis.yml

@@ -38,15 +38,19 @@ install:
   - if [[ $SETUP == 'full' ]]; then conda create --yes -q -n pyenv python=$PYTHON_VERSION numpy scipy nose=1.3.7 sphinx=1.3 griddataformats six; fi
   - if [[ $SETUP == 'minimal' ]]; then conda create --yes -q -n pyenv python=$PYTHON_VERSION numpy nose=1.3.7 sphinx=1.3 griddataformats six; fi
   - source activate pyenv
-  - if [[ $SETUP == 'full' ]]; then conda install --yes cython biopython matplotlib networkx netcdf4; fi
+  - |
+    if [[ $SETUP == 'full' ]]; then \
+        conda install --yes cython biopython matplotlib networkx netcdf4; \
+        conda install -c biobuilds clustalw=2.1; \
+    fi
   - if [[ $SETUP == 'minimal' ]]; then conda install --yes cython biopython networkx; fi
 # ensure that cython files are rebuilt
   - find . -name '*.pyx' -exec touch '{}' \;
   - pip install -v package/
   - pip install testsuite/
   - pip install coveralls
   - chmod +x testsuite/MDAnalysisTests/mda_nosetests
-# additional external tools (Isssue #898) -- HOLE
+# additional external tools (Issue #898) -- HOLE
   - |
      if [[ $SETUP == 'full' ]]; then \
          bash ./maintainer/install_hole.sh $TRAVIS_OS_NAME "${HOME}/${MDA_OPTPACKAGES}"; \