[LAU] AMS (source!) patches

[Karsten Wiese]

hi,

I've uploaded 3 patches to
	https://sourceforge.net/tracker/?group_id=69130&atid=523505

1) "Bugfix: Keep phi < wave_period": results in less crackles here.

2) "New SynthData::exp_table_ln2()": slightly (~6%) smaller cpu hunger.

3) "s/log(2.0)/M_LN2/": superseeded by 2).

Comments welcome,
Karsten