Merge pull request #867 from melissalinkert/rebased/dev_5_0/xmlannotation-parsing

Ignore text nodes when parsing XMLAnnotation's value (rebased onto dev_5_0)
merge dev_5_0 -D org -I include -E exclude: PR 856 (Initial version of bfCheckJavaMemory)
merge dev_5_0 -D org -I include -E exclude: PR 871 (Fix tiled TIFF reading and writing)
merge dev_5_0 -D org -I include -E exclude: PR 874 (SDT: read each data block into a separate series (rebased onto dev_5_0))