Add corpora processing script to cut invalid chars
Add corpora processing script to cut invalid chars

Motivation:
-the encoding / chars in the corpus are a little all over the place, now
that I'm doing all the topics it made sense to automate this.
-had only done the abortion folder before

Change Explanation:
-iterate all the files for each topic
-remove the tags / meta data comments
-remove invalid chars

charlieegan3/standpoint,charlieegan3/points-extraction,charlieegan3/points-extraction,charlieegan3/standpoint,charlieegan3/standpoint,charlieegan3/points-extraction,charlieegan3/points-extraction,charlieegan3/points-extraction,charlieegan3/standpoint,charlieegan3/points-extraction,charlieegan3/standpoint