Lucene.Net.Codec project and files

Appending and DiskDV are ported. The rest are are .java renamed to .cs
waiting to be converted and tweaked
Pulsing Codec

One issue still in PulsingPostingReader.cs - static interface conversion
from java
Lucene.Net.Codecs.Bloom

Bloom Codec - few more tweaks required
Substantial Blockterms Codec porting & additional clean up
Merge remote-tracking branch 'prescott/Lucene.Net_4.8.0' into Lucene.Net_4.8.0
READMEs
Moving stuff around