Fix typos in the documentation
Unify the one line comment style

Double slash followed by a space everywhere
Simplify copy from classpath to solr conf path
Add english stopwords
Add text_en_splitting for more precise searches
Add fieldType Text general for URLs and Text
Properly set SOLR_HOME and the core name during IT

The integration tests now need proper settings to load external files
(stopwords_en.txt) from the class path
Merge branch 'master' into search-1.3.x