[LANG-1177] Added indexesOf methods and simplified removeAllOccurences #471.
[LANG-1177] Added indexesOf methods and simplified removeAllOccurences
#471.

MarkDacek/commons-lang,MarkDacek/commons-lang,apache/commons-lang,britter/commons-lang,apache/commons-lang,britter/commons-lang,britter/commons-lang,apache/commons-lang,MarkDacek/commons-lang