maximum line length to be read from Conquest_input

[ayakon]

Sometimes we need to read a long line exceeding 132 characters from Conquest_input,
for example, when we read trial vectors of multisite functions including f-functions from Conquest_input.

For that, the maximum line length to be read was changed from 132 to 256.

This is related to the branch "f-change-line-length".

[ayakon]

The modification was merged to the develop branch successfully.