add new function casimir_integrate, that returns the integrals A,B,C and D for
p=TE,TM
remove swap files
* Add a function to integrate every component of a vector
* Functions integrate now f(x)*exp(-x) instead of f(x)
* Functions now return associated Legendre polynomials Plm or spherical
  harmonics evaluated at phi=0 for x=cos(theta)
* New function, that returns Yl1m, Yl2m, dYl1m and dYl2m
* Added comments.
* Added comments.
* Deleted obsolete code and functions.
* The integration is now done as a vector to increase speed.
* Use casimir_logdet1m to calculate log(det(1-M))
* check, if we support integration with given n
* support scaling for integration:
  The problem is, that the integral may be very large or very small. To prevent
  over- and underflows, it is neat to scale the integral.
* fixed wrong prototype
* balance matrix elements
* add function matrix_info
* change license
* add function la_matrix_info that writes various information about a matrix to
  a stream
* use scaled quantities
* use SI units for input and output and convert them to scaled quantities
  during calculation
* enable scaling
* disable debugging output
* frontend tool uses scaled quantities
* updated comments
* all functions start now with prefix casimir_
* distinguish between L and ScriptL
* calculate Xi in a more straight manner
* add function to convert free energy and temperature between SI and
  dimensionless units
change compiler flags that are more strict