some hipo::bank getters are missing error protection or automatic typecast

[c-dilks]

For example, given hipo::bank b with REC::Particle schema,

b.getFloat("pid", row);

returns 0.0 and no error is printed. All getters should either attempt to typecast or throw an error upon failure.

[c-dilks]

Sorry for opening so many issues here, I'll try to open pull requests next week, at least for the easy ones.