Hotfixes
- Compiling problem fixed on CYGWIN
- Fix to the error checking of volume exchange if simulation volume became negative
- Fix the equation to impose fix angle if the angle is less than 90. Generate error if constrained angle is not possible.
- Fixed a bug where move timings were 0 in windows.
- Fixed the issue where input files imported from NVT to NPT had zero volume, default value of 500 will be assigned in those cases.