Merge pull request #1 from modethirteen/master

allow httpplug children to take a custom invocation callback
Merge pull request #2 from modethirteen/master

ignore gitignore
add stuff to readme for dummies like me
Merge pull request #3 from PeteE/master

add stuff to readme for dummies like me
Update README.md
more useful exception message
strict value check to return false bool values
move mindtouch environment-based plug configuration out
Merge remote-tracking branch 'origin/master'
cleanup and start test suite
Update README.md
update readme
Merge remote-tracking branch 'origin/master'
Fixing xml encoding in XArray
adding newlines
removing gitignore
Merge pull request #5 from yurigorokhov/MT-15615_encoding_of_xml_values

Mt 15615 encoding of xml values
mock request body
Merge branch 'master' of github.com:MindTouch/MindTouch-API-PHP-Client
revert blowing out readme