add "encoding" option to ElementTreeProperty
supplement doc
use double quote
encode for travis-ci
add "keep" pick mode in XPathTextProperty
supplement doc
test encoding option
test for keep pick_mode
modify doc due to E501 line too long (82 > 79 characters)
Merge pull request #9 from VeryCB/pick_mode_keep

add "keep" option for pick mode in XPathTextProperty
test etree parse with encoding
use double quote
Merge pull request #8 from VeryCB/encoding_option

encoding option for ElementTreeProperty
disable the redirect_defaults option.
resolve the problem about redirect exception.
rename CHANGES.rst to CHANGES.
add authors and contributors list into the document.
update the project manifest.
normalize the project name: Brownant.
refine a variable's name.