fix write dict to xls fail

Merge pull request #44 from alingse/add-write-dict-to-xls

fix write dict to xls exception

jsoncsv use io.TextIOWrapper

Merge pull request #41 from alingse/add-test-1

add test

fix and enhance is_array check

fix

echo '["a", "ab", "b", "a", "ab", "b", "a", "ab", "b", "a", "ab", "b"]' | jsoncsv | jsoncsv -r

not restore

support json_array -A / --array

$ echo '[{"a":{"b":1}},{"a":{"c":2}}]'|jsoncsv -A|mkexcel
a.b,a.c
1,
,2

real use unicodecsv

fix the wrong use of unicodecsv

use unicodecsv

Merge pull request #33 from alingse/release-2.2.0

release 2.2.0

add library support

convert_json 
dump_excel 

support python3 (3.5 3.6)

Merge pull request #26 from alingse/support-py3-4

change log & readme

support unicode

Merge pull request #18 from alingse/add-unicode-enhance

support unicode

add --safe

--safe在path 中包含 separator时， 可以安全的产生 key

restore 是不会出错。