Added tag stable, 1.2.1 for changeset 34b4a7fd277f

--HG--
branch : stable
Fixed an error with the 'go' command in the example
updated the readme
Fixed the example bug for lua 5.2 as well
hopefully fixed the example bug for both lua 5.1 and lua 5.2
made the error checking in the example easier and documented it
made Map::swap noexcept
merge
Fixed bound checking in example_01
Fixed SIGSEGV at empty user input and added adv_emptyInput()

--HG--
branch : stable
merge stable
Added tag 1.2.2 for changeset 62908212a757