added pause API to xml and pbf parser without implementation
Merge branch 'master' into pauseResume

Conflicts:
	test/xmlPbfTest.js
Merge branch 'master' into pauseResume
Merge branch 'master' into pauseResume

Conflicts:
	lib/pbfParser.js
fixed typo in test description
implemented pbf pause function without resume nor test
implemented parser resuming but not yet working for xml parser
implemented parser resume
added pause/resume example to README