Read the PM2_MODIFY_REQUIRE from process.env first before default to constant value

Read the PM2_MODIFY_REQUIRE from process.env first before default to constant value
#125
readme update
reload by process name + json env tests + reload tests
test in package.json
dropping test for 0.8
Merge pull request #201 from subeeshcbabu/master

Read the PM2_MODIFY_REQUIRE from process.env first before default to constant value