Added a lot of const where appropriate

[r4148]

find_double_bits_int_mode() added

[r4147]

[r4146]

[r4145]

[r4144]

[r4143]

[r4142]

[r4141]

[r4140]

[r4139]

[r4138]

[r4137]

[r4136]

[r4135]

[r4134]

** the '.a' are ranlib'ed already, and the '.so' doesn't need ranlib-ing

[r4133]

[r4132]

This improves compatibility with some systems.

[r4130]

[r4127]

[r4126]

[r4125]

[r4124]

[r4123]

[r4122]

[r4121]

[r4117]

[r4116]

[r4115]

[r4114]

[r4112]

[r4111]

[r4110]

[r4109]

[r4108]

[r4107]

[r4105]

[r4104]

[r4103]

[r4102]

[r4101]