Fix help part

Adapt help text to new base directory
Add htdocs helper scripts from old JabRef repository
Merge pull request #12 from IngvarJackal/master

BugFix for #959 "StringIndexOutOfBoundsException with invalid Preview text"
Merge pull request #13 from IngvarJackal/master

Language locale fix for BugFix #959
Update JabRef_es.properties

Updated Spanish translation file
Localization: add of new keys waiting for translation. One unused key removed.
Add detail about "About.html"
Merge branch 'master' of https://github.com/IngvarJackal/jabref into IngvarJackal-master

Conflicts:
	src/main/resources/resource/JabRef_da.properties
	src/main/resources/resource/JabRef_de.properties
	src/main/resources/resource/JabRef_en.properties
	src/main/resources/resource/JabRef_es.properties
	src/main/resources/resource/JabRef_fr.properties
	src/main/resources/resource/JabRef_in.properties
	src/main/resources/resource/JabRef_it.properties
	src/main/resources/resource/JabRef_ja.properties
	src/main/resources/resource/JabRef_nl.properties
	src/main/resources/resource/JabRef_no.properties
	src/main/resources/resource/JabRef_pt_BR.properties
	src/main/resources/resource/JabRef_ru.properties
	src/main/resources/resource/JabRef_tr.properties
	src/main/resources/resource/JabRef_vi.properties
	src/main/resources/resource/JabRef_zh.properties