Plus One

http://oj.leetcode.com/problems/plus-one/
Merge branch 'master'

Conflicts:
README.md
Merge branch 'master' of https://github.com/Dectinc/leetcode_java

Conflicts:
	README-1.md
merge
Merge branch 'master' of https://github.com/Dectinc/leetcode_java

Conflicts:
	README.md