refactoring, phpDoc

Merge pull request #99 from lesstif/analysis-86AonN

Apply fixes from StyleCI

get project's version info.

1.14

get project version field.

creator field in the search results as nullable.

fixed #86

added validateQuery param in the search function

fixed #83

optional curl follow location

merge from #81, #82

bug fix release

fixed #80 , #78

find users api

find users, find assignable users

additianal log level

ref #74

add create group

1.12.0

add 2 feature(create group, retrive users from group)

add issue link feature.

ref #73