Sanitize contract and abi names provided in manifest

[saihaj]

If a user gives YourContract.sol as a name for ABI this will break code generation.

In the case this happens we can sanitize the input so the generated TS is still valid. Or we can tell user not to input that as a name. If we decide to not let users input that as a name then on init we also need to sanitize the name we give from the ABI file name