Add BibLaTeX snippets and parenthesis snippet

Signed-off-by: Rene Vergara <rene.a.vergara@gmail.com>
Add a snippet for BibLaTeX for book, inbook, online and article.

Add a snippet for LaTeX to enter a parenthesis pair.

UltiSnips/bib.snippets

@@ -0,0 +1,50 @@
+snippet online "Online resource" b
+@Online{${1:name},
+	author={${2:author}},
+	title={${3:title}},
+	date={${4:date}},
+	url={${5:url}}
+}
+$0
+endsnippet
+
+snippet article "Article reference" b
+@Article{${1:name},
+	author={${2:author}},
+	title={${3:title}},
+	journaltitle={${4:journal}},
+	volume={${5:NN}},
+	number={${6:NN}},
+	year={${7:YYYY}},
+	pages={${8:NN}--${9:NN}}
+}
+$0
+endsnippet
+
+snippet book "Book reference" b
+@book{${1:name},
+	author={${2:author}},
+	title={${3:title}},
+	subtitle={${4:subtitle}},
+	year={${5:YYYY}},
+	location={${6:somewhere}},
+	publisher={${7:publisher}},
+	pages={${8:NN}--${9:NN}}
+}
+$0
+endsnippet
+
+snippet inb "In Book reference" b
+@Inbook{${1:name},
+	author={${2:author}},
+	title={${3:title}},
+	subtitle={${4:subtitle}},
+	booktitle={${5:book}},
+	editor={${6:editor}},
+	year={${7:YYYY}},
+	location={${8:somewhere}},
+	publisher={${9:publisher}},
+	pages={${10:NN}--${11:NN}}
+}
+$0
+endsnippet

UltiSnips/tex.snippets

@@ -130,4 +130,8 @@ snippet pac "Package" b
 \usepackage[${1:options}]{${2:package}}$0
 endsnippet
 
+
+snippet lp "Long parenthesis" 
+\left(${1:${VISUAL:contents}}\right)$0
+endsnippet
 # vim:ft=snippets: