Added in invoice.clj namespace and invoice.cls latex file to resources
Primitive hiccup-style latex rendering
writelatex is now better spaced and adds quotation marks around strings
Added in hourrow and feerow functions
Helper functions added to build invoice latex doc
Basic function for compiling latex doc to pdf
layout function is nearly creating near-perfect pdf apart from
the hour row and fee row.

compile-pdf function sketched up. absolute path for the pdflatex command
needs to be resolved.
Merge branch 'feature/pdf' into develop
compile-pdf executing pdflatex within resources dir
Fixed up hour-table and expense-table functions
compile-pdf returning path to pdf file

mk-pdf returning inputstream of pdf as the ring response. function is
still missing crucial bits of information to build proper invoice (hours, expenses, title etc)
Merge branch 'release/v0.0.1'
Updated gitignore to ignore all latex related files
Added wildward in gitignore for latex files