Updated Fibonacci test case and wrote .svel draft
Merge pull request #32 from emilyhsia/master

allow variable declaration in parser
handle file declarations in treewalker
compiler now produces properly named file.

compiler now checks if a source python file exists before compilation.
allow variable declaration in parser
parser: allow print of an expression
Merge pull request #34 from emilyhsia/master

Parser: allow print of an expression
Removed old syntax examples
Added comment banners at top of files
Modified svelLex.py to tokenize input file

Used to only tokenize user input; can now tokenize input file with call:
```python svelLex.py <path_to_input_file>```
Fixed shift/reduce conflict and added file parsing

Like svelLex, can now parse input file with call:
```python svelYacc.py <path_to_input_file>
allow variable declaration in parser
parser: allow print of an expression
parser: allow print of an expression
begin implementing type/value checking
fixed typo in funct.py.

fib svel file compiles.
created compile.sh to facilitate compilation.
added execute environment to compile script
Merge pull request #33 from JALsnipe/master

Tree walker: handle test file for demo
added verbose (-v) flag to compiler and helper script.