Added elements to hamlet for testing visibility
making solr test more robust; clean up before starting
first pass implementation for element visibility
there are still failing tests, but the basic
groundwork is in place
fixing issues relating to lux:search() document ordering optos
wrapping a few more document-ordering cases; uncovered and fixed a bug
w/declaring ordered search results to be document-ordered no matter
what order they actually were.  Now we wrap ordered flwors in an
unordered call, and report ordering correctly to the Saxon optimizer.
refactored for better code sharing
indicate docid-ordering with a null sort criterion
indented
added missing core close() - this is needed on Windows, at least
clean up cores after each test properly
fixed element text analyzer test after element visibility changes
change log level to info
attempt to fix "too many close" error that showed up only on travis-CI
yet another attempt to shut down solr cleanly
debug prints for travis
turns out that getCore() increases a refcount that needs to be matched
by close().  Who knew?
travis print my errors, please
check for existence of files before attempting to clean them out
more of same
travis build fixed! removing debug statements
Merge branch 'lux-0.10'

Conflicts:
	src/main/java/lux/CachingDocReader.java
	src/main/java/lux/SearchResultIterator.java
	src/main/java/lux/functions/Contains.java
	src/main/java/lux/index/IndexConfiguration.java
	src/main/java/lux/index/field/FieldDefinition.java
	src/main/java/lux/search/DocIterator.java
	src/main/resources/log4j.properties
	src/test/java/lux/SearchTest.java
	src/test/java/lux/solr/BaseSolrTest.java
	src/test/java/lux/solr/SchemaTest.java
	src/test/java/lux/solr/SolrMultiCoreTest.java
	src/test/java/lux/solr/TLogTest.java