ILSAstats 0.4.0

• Added ILSAinfo() with ILSA information, and pre-setups with repcreateILSA() and setupILSA().
• Added support for CIVED, TIMSS and PIRLS pre 2015.
• Added aggregate options to repmean() and reprho().

ILSAstats 0.3.8

• Fixed a bug in repglm().
• Fixed a bug in the method of repmean().

ILSAstats 0.3.7

• Initial version