Rename `fsic` package to `FSIC`

Rename `fsic` package to `FSIC`, so as not to clash with forthcoming
`fsic.py` script.
Update `.gitignore` to reflect package name change

Update `.gitignore` to reflect package name change.
Update FSIC `__init__.py` to get version number

Update FSIC `__init__.py` to get version number following package name
change.
Update package name in `setup.py`

Update package name in `setup.py`, following name change.
Update `scripts/fsic.py` with `build` sub-parser

Update `scripts/fsic.py` with `build` sub-parser, in place of previous
`fsic-build.py` implementation.
Update `import` statements to reflect name change

Update `import` statements to reflect name change, from `fsic` to
`FSIC`.
Remove redundant equation from `recursive()` test

Remove redundant equation from `recursive()` test. Need another function
to test for warnings.
Update shebang line in `fsic.py`

Update shebang line in `fsic.py`.

**Make sure line encodings for installable scripts are compatible with
  the host system, e.g. Unix on Unix-alikes.**