Refactors installer to be more forgiving of failures (#2)

* Refactors installer to be more forgiving of failures

Includes the following:
- List of pre-build dependencies that can be installed with system package manager
  - At the moment this only works for debian-like systems
- Moves perl dependencies into a perldeps file to reduce code duplication
- Moves perl DB package into a conditional clause based on user needs
- Adds 'installed' after successful compilation/installation of each dependency
  - This allows the program to re-execute upon failure and resume where it failed
- Allows administrator to leverage multi-processor systems to speed up dependency compilation

* Fixes gnuplot installation error

* prevent unnecessary downloading

* removing more failed checks

* another error in the installer

debiandeps

@@ -0,0 +1,22 @@
+libbz2-dev
+cmake
+gcc
+libc-dev
+libc6-dev
+libgcc-7-dev
+liblzma-dev
+perl
+python
+python3-virtualenv
+virtualenv
+libpython-stdlib
+libpython2.7-stdlib
+tar
+unzip
+wget
+openjdk-11-jre-headless
+tmux
+ghostscript
+libgs9
+zlib1g-dev
+g++